{"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":25.0,"currency_code":"GBP","in_stock":true},{"title":"100 Bags","offer_id":64969304998237,"sku":"UNI-XLSB-100","price":95.0,"currency_code":"GBP","in_stock":true},{"title":"500 (Full Box)","offer_id":64969305031005,"sku":"UNI-XLSB-500","price":400.0,"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\/products\/unicorn-xlsb-mushroom-substrate-fruiting-bag-extra-large","provider":"Myco Revolution","version":"1.0","type":"link"}