{"title":"All","description":null,"products":[{"product_id":"unicorn-14a-mushroom-substrate-fruiting-bag-large","title":"Unicorn 14A — Mushroom Substrate Fruiting Bag (Large)","description":"\u003cp\u003eThe Unicorn 14A is the bestselling mushroom substrate fruiting bag in the range — and for most growers, it's the only one they'll ever need. Works across the widest range of species of any bag in the Unicorn lineup: oyster, shiitake, lion's mane, chestnut, king oyster and more. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.5 micron A filter — balanced gas exchange, maintains moisture retention during colonisation without over-drying your block\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 3kg of substrate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 19\" x 8\" x 5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Growers Choose the 14A\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe most versatile bag in the Unicorn fruiting range — substrate prep, fruiting blocks and in-bag fruiting all covered\u003c\/li\u003e\n  \u003cli\u003eThe 0.5 micron A filter gives consistent gas exchange without the moisture loss that wider filters can cause\u003c\/li\u003e\n  \u003cli\u003e3.0 mil polypropylene handles autoclave and pressure cooker cycles without warping or seal failure\u003c\/li\u003e\n  \u003cli\u003eTrusted by hobbyists + commercial growers worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNeed a smaller bag? We also stock the compact \u003ca href=\"\/products\/unicorn-4a-mushroom-substrate-fruiting-bag-small\"\u003e4A\u003c\/a\u003e and \u003ca href=\"\/products\/unicorn-10a-mushroom-substrate-fruiting-bag-medium\"\u003e10A\u003c\/a\u003e for smaller grows. Ready for more volume? The \u003ca href=\"\/products\/unicorn-xls-a-mushroom-substrate-fruiting-bag-extra-large\"\u003eXLS-A\u003c\/a\u003e is built for high-volume production.\u003c\/p\u003e\n\n\u003cp\u003eNeed grain spawn bags instead? See our \u003ca href=\"\/collections\/mushroom-spawn-bags\"\u003espawn bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe 14A is the most common bag growers start with when it comes to mushroom substrate fruiting bags. In stock \u0026amp; dispatched quickly from our UK warehouse.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64886038004061,"sku":"UNI-14A-10","price":9.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386399069,"sku":"UNI-14A-25","price":19.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386431837,"sku":"UNI-14A-50","price":34.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64886038036829,"sku":"UNI-14A-100","price":64.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/66AFFEC0-6E55-489D-8C13-AD1A5B4949F0.jpg?v=1781357051"},{"product_id":"unicorn-xls-a-mushroom-substrate-fruiting-bag-extra-large","title":"Unicorn XLSA — Mushroom Substrate Fruiting Bag (Extra Large)","description":"\u003cp\u003eThe Unicorn XLS-A is the biggest mushroom substrate fruiting bag in the range — and when you need serious volume \u0026amp; reliability, nothing else comes close. At up to 6.8kg of substrate per bag, this is what micro-farms and commercial producers reach for: extra-large fruiting blocks, in-bag fruiting, reishi antlers to high-yielding oysters \u0026amp; lion's mane. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.5 micron A filter — controlled gas exchange scaled for large substrate mass, maintains moisture balance during colonisation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 6.8kg of substrate (roughly double the standard 14A)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 24\" x 10\" x 5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal — essential at this size\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Growers Choose the XLS-A\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble the substrate per bag versus the 14A — fewer autoclave runs, lower cost per block, more output per cycle\u003c\/li\u003e\n  \u003cli\u003eThe go-to bag for commercial operations\u003c\/li\u003e\n  \u003cli\u003eHandles full autoclave cycles at this volume without seal failure or warping\u003c\/li\u003e\n  \u003cli\u003eTrusted by hobbyists + commercial growers worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNeed smaller bags? We also stock the compact \u003ca href=\"\/products\/unicorn-4a-mushroom-substrate-fruiting-bag-small\"\u003e4A\u003c\/a\u003e and \u003ca href=\"\/products\/unicorn-10a-mushroom-substrate-fruiting-bag-medium\"\u003e10A\u003c\/a\u003e, plus the bestselling \u003ca href=\"\/products\/unicorn-14a-mushroom-substrate-fruiting-bag-large\"\u003e14A\u003c\/a\u003e for standard fruiting block production.\u003c\/p\u003e\n\n\u003cp\u003eNeed grain spawn bags instead? See our \u003ca href=\"\/collections\/mushroom-spawn-bags\"\u003espawn bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe XLS-A is the bag growers move to when they're ready to scale their mushroom substrate fruiting. In stock \u0026amp; dispatched quickly from our UK warehouse.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64886041182557,"sku":"UNI-XLSA-10","price":14.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386497373,"sku":"UNI-XLSA-25","price":29.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386530141,"sku":"UNI-XLSA-50","price":54.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64886041215325,"sku":"UNI-XLSA-100","price":89.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/3CF5B432-116D-4982-9FFF-FD601586A5EB.jpg?v=1781357770"},{"product_id":"unicorn-4t-grain-spawn-bag","title":"Unicorn 4T — Mushroom Grain Spawn Bag (Small)","description":"\u003cp\u003eThe Unicorn 4T is the standard grain spawn bag for batches up to 1kg — compact, reliable, and the bag most UK growers reach for first. Whether you're running rye, oat grain or wheat berries, it handles autoclave and pressure cooker cycles cleanly with no warping or seal failure. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.2 micron T filter — tight filtration for grain spawn, minimises contamination risk during colonisation\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 400g – 1kg of grain\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4\" × 3\" × 18\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy growers choose the 4T\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe 0.2 micron T filter is the tightest in the Unicorn spawn range — ideal when you want to minimise contamination pressure on smaller batches\u003c\/li\u003e\n  \u003cli\u003eCompact footprint means you can fit more bags per autoclave run\u003c\/li\u003e\n  \u003cli\u003ePerfect for hobbyists, small lab setups, and anyone working in the 1kg grain range\u003c\/li\u003e\n  \u003cli\u003eThe same bag we've been running our own grain spawn in since 2021\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eReady to scale up? The \u003ca href=\"\/products\/unicorn-10t-grain-spawn-bag\"\u003e10T\u003c\/a\u003e holds up to 1.8kg, the \u003ca href=\"\/products\/unicorn-3t-mushroom-grain-spawn-bag-large\"\u003e3T\u003c\/a\u003e up to 3kg, and the \u003ca href=\"\/products\/unicorn-xlst-mushroom-grain-spawn-bag-extra-large\"\u003eXLST\u003c\/a\u003e up to 6.8kg — more grain per run, same trusted 0.2 micron T filter.\u003c\/p\u003e\n\n\u003cp\u003eNeed substrate bags instead? See our \u003ca href=\"\/collections\/mushroom-fruiting-bags\"\u003efruiting bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eIn stock at our Glasgow warehouse. Dispatched same or next day.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64888385962333,"sku":"UB-4T-10","price":10.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386562909,"sku":"UB-4T-25","price":21.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386595677,"sku":"UB-4T-50","price":39.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64888386060637,"sku":"UB-4T-100","price":69.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/74774F8B-3E05-4C7E-88BD-49F480858F8B.jpg?v=1781358266"},{"product_id":"unicorn-10t-grain-spawn-bag","title":"Unicorn 10T — Mushroom Grain Spawn Bag (Medium)","description":"\u003cp\u003eThe Unicorn 10T is the workhorse grain spawn bag — and for most growers running regular batches, it's the one they end up sticking with. At up to 1.8kg per bag you get more spawn per run with fewer bags to seal, load, and shake out. The same 0.2 micron T filter as the 4T, scaled up. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.2 micron T filter — tight filtration that keeps contamination pressure low through the full colonisation period\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 1.8kg of grain\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\" × 4\" × 18\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy growers choose the 10T\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe most popular grain spawn bag size in the Unicorn range — fewer bags per batch means less handling, faster workflow\u003c\/li\u003e\n  \u003cli\u003eSame trusted 0.2 micron T filter as the 4T with up to 80% more grain capacity per bag\u003c\/li\u003e\n  \u003cli\u003eHandles full autoclave cycles at this weight without seal failure or warping\u003c\/li\u003e\n  \u003cli\u003eThe bag we use for our own grain spawn production — we've run thousands of these since 2021\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNeed a smaller bag for tighter batches? The \u003ca href=\"\/products\/unicorn-4t-grain-spawn-bag\"\u003e4T\u003c\/a\u003e holds up to 1kg. Scaling up? The \u003ca href=\"\/products\/unicorn-3t-mushroom-grain-spawn-bag-large\"\u003e3T\u003c\/a\u003e (up to 3kg) and \u003ca href=\"\/products\/unicorn-xlst-mushroom-grain-spawn-bag-extra-large\"\u003eXLST\u003c\/a\u003e (up to 6.8kg) carry more grain per bag.\u003c\/p\u003e\n\n\u003cp\u003eNeed substrate bags instead? See our \u003ca href=\"\/collections\/mushroom-fruiting-bags\"\u003efruiting bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eIn stock at our Glasgow warehouse. Dispatched same or next day.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64888386093405,"sku":"UB-10T-10","price":12.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386661213,"sku":"UB-10T-25","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386693981,"sku":"UB-10T-50","price":44.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64888386191709,"sku":"UB-10T-100","price":79.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/47BBA0B2-70FD-46C6-BA47-1983BF3F9335.jpg?v=1781358522"},{"product_id":"unicorn-4a-mushroom-substrate-fruiting-bag-small","title":"Unicorn 4A — Mushroom Substrate Fruiting Bag (Small)","description":"\u003cp\u003eThe Unicorn 4A is the most compact mushroom substrate fruiting bag in the range — the easy starting point for hobby growers, tight spaces and trialling new species without committing to a full-size block. Despite its size it's built to the same professional standard as the rest of the line, with a 0.5 micron A filter for clean, balanced gas exchange. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.5 micron A filter — balanced gas exchange, maintains moisture retention during colonisation without over-drying your block\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 1kg of substrate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 4\" x 3\" x 18\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Growers Choose the 4A\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe smallest, lowest-cost way into Unicorn fruiting bags — ideal for hobbyists, testing and limited grow space\u003c\/li\u003e\n  \u003cli\u003eThe 0.5 micron A filter gives consistent gas exchange without the moisture loss that wider filters can cause\u003c\/li\u003e\n  \u003cli\u003e3.0 mil polypropylene handles autoclave and pressure cooker cycles without warping or seal failure\u003c\/li\u003e\n  \u003cli\u003eTrusted by hobbyists + commercial growers worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eReady to scale up? We also stock the \u003ca href=\"\/products\/unicorn-10a-mushroom-substrate-fruiting-bag-medium\"\u003e10A\u003c\/a\u003e and the bestselling \u003ca href=\"\/products\/unicorn-14a-mushroom-substrate-fruiting-bag-large\"\u003e14A\u003c\/a\u003e for larger fruiting blocks, plus the \u003ca href=\"\/products\/unicorn-xls-a-mushroom-substrate-fruiting-bag-extra-large\"\u003eXLS-A\u003c\/a\u003e for high-volume production. Looking for grain spawn bags? We stock Unicorn spawn bags too — browse our full range.\u003c\/p\u003e\n\n\u003cp\u003eThe 4A is where many growers start with mushroom substrate fruiting bags. In stock \u0026amp; dispatched quickly from our UK warehouse.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64949106540893,"sku":"UNI-4A-10","price":9.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386726749,"sku":"UNI-4A-25","price":17.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386759517,"sku":"UNI-4A-50","price":28.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64949106573661,"sku":"UNI-4A-100","price":49.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/productpicssoonunicorn-nontrans.png?v=1781127757"},{"product_id":"unicorn-10a-mushroom-substrate-fruiting-bag-medium","title":"Unicorn 10A — Mushroom Substrate Fruiting Bag (Medium)","description":"\u003cp\u003eThe Unicorn 10A is the compact, mid-small mushroom substrate fruiting bag in the range — a step up from the 4A when you want a little more substrate per bag while keeping things space-efficient. It runs the same 0.5 micron A filter as the rest of the Unicorn fruiting line, so colonisation and gas exchange stay consistent as you scale. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.5 micron A filter — balanced gas exchange, maintains moisture retention during colonisation without over-drying your block\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 1.8kg of substrate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 5\" x 4\" x 18\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Growers Choose the 10A\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMore substrate per bag than the 4A, still compact enough for smaller grow spaces and shelves\u003c\/li\u003e\n  \u003cli\u003eThe 0.5 micron A filter gives consistent gas exchange without the moisture loss that wider filters can cause\u003c\/li\u003e\n  \u003cli\u003e3.0 mil polypropylene handles autoclave and pressure cooker cycles without warping or seal failure\u003c\/li\u003e\n  \u003cli\u003eTrusted by hobbyists + commercial growers worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWant to go smaller or bigger? We also stock the compact \u003ca href=\"\/products\/unicorn-4a-mushroom-substrate-fruiting-bag-small\"\u003e4A\u003c\/a\u003e, the bestselling \u003ca href=\"\/products\/unicorn-14a-mushroom-substrate-fruiting-bag-large\"\u003e14A\u003c\/a\u003e, and the \u003ca href=\"\/products\/unicorn-xls-a-mushroom-substrate-fruiting-bag-extra-large\"\u003eXLS-A\u003c\/a\u003e for high-volume production. Looking for grain spawn bags? We stock Unicorn spawn bags too — browse our full range.\u003c\/p\u003e\n\n\u003cp\u003eThe 10A is a great middle ground for mushroom substrate fruiting bags. In stock \u0026amp; dispatched quickly from our UK warehouse.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64949106671965,"sku":"UNI-10A-10","price":11.49,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386825053,"sku":"UNI-10A-25","price":21.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386857821,"sku":"UNI-10A-50","price":41.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64949106704733,"sku":"UNI-10A-100","price":74.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/productpicssoonunicorn-nontrans.png?v=1781127757"},{"product_id":"unicorn-3t-mushroom-grain-spawn-bag-large","title":"Unicorn 3T — Mushroom Grain Spawn Bag (Large)","description":"\u003cp\u003eThe Unicorn 3T is the large grain spawn bag in the range — built for growers producing spawn in bulk. At up to 3kg of grain per bag you prep far more spawn per run with fewer bags to seal and shake out, while keeping the same tight 0.2 micron T filter that runs through the whole Unicorn spawn line. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.2 micron T filter — tight filtration that keeps contamination pressure low through the full colonisation period\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 3kg of grain\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 8\" × 5\" × 19\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy growers choose the 3T\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eMore grain per bag than the 4T or 10T — fewer autoclave runs and less handling when you're scaling spawn production\u003c\/li\u003e\n  \u003cli\u003eThe same trusted 0.2 micron T filter as the rest of the Unicorn spawn range\u003c\/li\u003e\n  \u003cli\u003eHandles full autoclave cycles at this volume without seal failure or warping\u003c\/li\u003e\n  \u003cli\u003eIdeal for larger labs and commercial growers running big spawn batches\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNeed smaller bags for tighter batches? We also stock the \u003ca href=\"\/products\/unicorn-4t-grain-spawn-bag\"\u003e4T\u003c\/a\u003e (up to 1kg) and \u003ca href=\"\/products\/unicorn-10t-grain-spawn-bag\"\u003e10T\u003c\/a\u003e (up to 1.8kg). Need even more capacity? The \u003ca href=\"\/products\/unicorn-xlst-mushroom-grain-spawn-bag-extra-large\"\u003eXLST\u003c\/a\u003e is the largest in the range.\u003c\/p\u003e\n\n\u003cp\u003eNeed substrate bags instead? See our \u003ca href=\"\/collections\/mushroom-fruiting-bags\"\u003efruiting bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eIn stock at our Glasgow warehouse. Dispatched same or next day.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64949106803037,"sku":"UB-3T-10","price":13.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287386923357,"sku":"UB-3T-25","price":23.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287386956125,"sku":"UB-3T-50","price":38.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64949106835805,"sku":"UB-3T-100","price":64.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/6748A935-F988-47D8-A81C-F6F70EE46763.jpg?v=1781358789"},{"product_id":"unicorn-xlst-mushroom-grain-spawn-bag-extra-large","title":"Unicorn XLST — Mushroom Grain Spawn Bag (Extra Large)","description":"\u003cp\u003eThe Unicorn XLST is the largest grain spawn bag in the range — made for serious, high-volume spawn production. At up to 6.8kg of grain per bag, it's the fewest-bags-per-batch option for commercial labs and micro-farms, with the same 0.2 micron T filter trusted across the Unicorn spawn line. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 0.2 micron T filter — tight filtration that keeps contamination pressure low through the full colonisation period\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 6.8kg of grain\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 10\" × 5\" × 24\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy growers choose the XLST\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe most grain per bag in the Unicorn spawn range — the go-to for commercial-scale spawn production\u003c\/li\u003e\n  \u003cli\u003eFewer bags to prep, seal and shake out per batch, lowering cost and handling per kilo\u003c\/li\u003e\n  \u003cli\u003eThe same trusted 0.2 micron T filter, scaled up for large grain loads\u003c\/li\u003e\n  \u003cli\u003eHandles full autoclave cycles at this volume without seal failure or warping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDon't need this much capacity? We also stock the \u003ca href=\"\/products\/unicorn-3t-mushroom-grain-spawn-bag-large\"\u003e3T\u003c\/a\u003e (up to 3kg), \u003ca href=\"\/products\/unicorn-10t-grain-spawn-bag\"\u003e10T\u003c\/a\u003e (up to 1.8kg) and \u003ca href=\"\/products\/unicorn-4t-grain-spawn-bag\"\u003e4T\u003c\/a\u003e (up to 1kg).\u003c\/p\u003e\n\n\u003cp\u003eNeed substrate bags instead? See our \u003ca href=\"\/collections\/mushroom-fruiting-bags\"\u003efruiting bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eIn stock at our Glasgow warehouse. Dispatched same or next day.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64949107884381,"sku":"UB-XLST-10","price":14.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287387021661,"sku":"UB-XLST-25","price":29.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287387054429,"sku":"UB-XLST-50","price":56.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64949107917149,"sku":"UB-XLST-100","price":99.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/productpicssoonunicorn-nontrans.png?v=1781127757"},{"product_id":"unicorn-4t-inj-mushroom-grain-spawn-bag-small-w-injection-port","title":"Unicorn 4T INJ — Mushroom Grain Spawn Bag (Small) w\/ Injection Port","description":"\u003cp\u003eSame as 4T but with factory applied injection port\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64949288763741,"sku":"UB-4T-INJ-10","price":19.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287387087197,"sku":"UB-4T-INJ-25","price":41.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287387119965,"sku":"UB-4T-INJ-50","price":79.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64949288796509,"sku":"UB-4T-INJ-100","price":149.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/3617C9A5-51A1-47AE-AEDB-A3DFE5F18FCB.jpg?v=1781359085"},{"product_id":"unicorn-10t-inj-mushroom-grain-spawn-bag-medium-w-injection-port","title":"Unicorn 10T INJ — Mushroom Grain Spawn Bag (Medium) w\/ Injection Port","description":"\u003cp\u003eSame as 10T but with factory applied injection port\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64949289517405,"sku":"UB-10T-INJ-10","price":22.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287387185501,"sku":"UB-10T-INJ-25","price":49.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287387218269,"sku":"UB-10T-INJ-50","price":89.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64949289550173,"sku":"UB-10T-INJ-100","price":169.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/E31AA311-F70D-4049-B0EA-BF2909DA703E.jpg?v=1781359289"},{"product_id":"unicorn-3b-mushroom-substrate-fruiting-bag-large","title":"Unicorn 3B — Mushroom Substrate Fruiting Bag (Large) *high gas exchange*","description":"\u003cp\u003eThe Unicorn 3B is a large mushroom substrate fruiting bag built around the breathable B filter — the choice for growers who need maximum gas exchange during colonisation. The same trusted bag dimensions as the 14A, but with a 5 micron B filter that promotes faster, freer air exchange. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 5 micron B filter — high gas exchange, promotes fresh air exchange for species sensitive to CO₂ build-up\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 5 lbs (~2.3kg) of substrate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 19\" × 8\" × 5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 2.5 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Growers Choose the 3B\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eThe B filter's 5 micron pore size delivers high gas exchange — ideal for species that need strong fresh air exchange and are sensitive to CO₂ build-up\u003c\/li\u003e\n  \u003cli\u003eSame trusted dimensions as the 14A in a slightly lighter 2.5 mil polypropylene construction\u003c\/li\u003e\n  \u003cli\u003e2.5 mil polypropylene handles autoclave and pressure cooker cycles without warping or seal failure\u003c\/li\u003e\n  \u003cli\u003eTrusted by hobbyists + commercial growers worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003ePrefer a more balanced gas exchange option? The \u003ca href=\"\/products\/unicorn-14a-mushroom-substrate-fruiting-bag-large\"\u003e14A\u003c\/a\u003e uses a 0.5 micron A filter for versatile use across the widest range of species. Ready for more volume? The \u003ca href=\"\/products\/unicorn-xls-a-mushroom-substrate-fruiting-bag-extra-large\"\u003eXLS-A\u003c\/a\u003e is built for high-volume production.\u003c\/p\u003e\n\n\u003cp\u003eNeed grain spawn bags instead? See our \u003ca href=\"\/collections\/mushroom-spawn-bags\"\u003espawn bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe 3B is the bag of choice when high gas exchange is the priority. In stock \u0026amp; dispatched quickly from our UK warehouse.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64969301557597,"sku":"UNI-3B-10","price":12.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287387873629,"sku":"UNI-3B-25","price":24.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287387906397,"sku":"UNI-3B-50","price":44.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64969301590365,"sku":"UNI-3B-100","price":74.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/D3CF03DA-AE4C-4F99-925C-B260972DFB91.jpg?v=1781371918"},{"product_id":"unicorn-xlsb-mushroom-substrate-fruiting-bag-extra-large","title":"Unicorn XLSB — Mushroom Substrate Fruiting Bag (Extra Large) *high gas exchange*","description":"\u003cp\u003eThe Unicorn XLS-B is the biggest high-gas-exchange mushroom substrate fruiting bag in the range — and when you need serious volume with maximum fresh air exchange, nothing else comes close. Same extra-large dimensions as the XLS-A but with a 5 micron B filter designed for species that thrive with strong gas exchange. Made in the USA since 1990 by Unicorn Bags LLC, the industry's most trusted name in mushroom cultivation bags.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFilter:\u003c\/strong\u003e 5 micron B filter (2\" × 3\") — high gas exchange, promotes fresh air exchange for species sensitive to CO₂ build-up\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e Up to 10 lbs (~4.5kg) of substrate\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 24\" × 10\" × 5\"\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C \/ 15 PSI\u003c\/li\u003e\n  \u003cli\u003eSide-gusseted, reinforced bottom seal — essential at this size\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Growers Choose the XLS-B\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExtra-large volume with a 5 micron B filter — the combination for high-output grows where strong gas exchange is critical\u003c\/li\u003e\n  \u003cli\u003eThe go-to bag for commercial operations growing species that demand high fresh air exchange\u003c\/li\u003e\n  \u003cli\u003eHandles full autoclave cycles at this volume without seal failure or warping\u003c\/li\u003e\n  \u003cli\u003eTrusted by hobbyists + commercial growers worldwide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003ePrefer controlled gas exchange at this size? The \u003ca href=\"\/products\/unicorn-xls-a-mushroom-substrate-fruiting-bag-extra-large\"\u003eXLS-A\u003c\/a\u003e uses a 0.5 micron A filter for balanced moisture retention across the widest range of species. Need smaller bags? We also stock the compact \u003ca href=\"\/products\/unicorn-4a-mushroom-substrate-fruiting-bag-small\"\u003e4A\u003c\/a\u003e and \u003ca href=\"\/products\/unicorn-10a-mushroom-substrate-fruiting-bag-medium\"\u003e10A\u003c\/a\u003e, plus the bestselling \u003ca href=\"\/products\/unicorn-14a-mushroom-substrate-fruiting-bag-large\"\u003e14A\u003c\/a\u003e for standard fruiting block production.\u003c\/p\u003e\n\n\u003cp\u003eNeed grain spawn bags instead? See our \u003ca href=\"\/collections\/mushroom-spawn-bags\"\u003espawn bag range\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe XLS-B is the bag growers move to when they need extra-large scale with high gas exchange. In stock \u0026amp; dispatched quickly from our UK warehouse.\u003c\/p\u003e","brand":"Unicorn Bags","offers":[{"title":"10 Bags","offer_id":64969304965469,"sku":"UNI-XLSB-10","price":16.99,"currency_code":"GBP","in_stock":true},{"title":"25 Bags","offer_id":65287387971933,"sku":"UNI-XLSB-25","price":34.99,"currency_code":"GBP","in_stock":true},{"title":"50 Bags","offer_id":65287388004701,"sku":"UNI-XLSB-50","price":59.99,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64969304998237,"sku":"UNI-XLSB-100","price":94.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1067\/7010\/4669\/files\/0C4592CE-2E3D-49F7-80EE-03AB4FB08031.jpg?v=1781372465"}],"url":"https:\/\/mycorevolution.co.uk\/collections\/all.oembed","provider":"Myco Revolution","version":"1.0","type":"link"}