Unicorn XLST — Mushroom Grain Spawn Bag (Extra Large)

The 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.

Specifications

• Filter: 0.2 micron T filter — tight filtration that keeps contamination pressure low through the full colonisation period
• Capacity: Up to 6.8kg of grain
• Size: 10" × 5" × 24"
• Material: 3.0 mil polypropylene — autoclave and pressure cooker safe at 121°C / 15 PSI
• Side-gusseted, reinforced bottom seal

Why growers choose the XLST

• The most grain per bag in the Unicorn spawn range — the go-to for commercial-scale spawn production
• Fewer bags to prep, seal and shake out per batch, lowering cost and handling per kilo
• The same trusted 0.2 micron T filter, scaled up for large grain loads
• Handles full autoclave cycles at this volume without seal failure or warping

Don't need this much capacity? We also stock the 3T (up to 3kg), 10T (up to 1.8kg) and 4T (up to 1kg).

Need substrate bags instead? See our fruiting bag range.

In stock at our Glasgow warehouse. Dispatched same or next day.