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$30.00
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Contiguous 48 states & DC · 4–7 business days total
30-day returns
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Product brand: North Spore
The details
Achieve consistent, contamination-free mushroom cultivation with North Spore's
0.2 Micron Filter Patch Unicorn 3T Mushroom Grow Bags
. A critical component for indoor growers, these bags provide an optimal environment for both spawn and substrate colonization, supporting a foundation for successful yields.
Each grow bag features a precisely engineered 0.2 micron filter patch, essential for balanced gas exchange while rigorously preventing airborne contaminants from entering the sterile growing medium. This ensures a clean and thriving environment for your mycelium.
Constructed from durable 2.2 mil thick polypropylene, these bags are designed to withstand the high temperatures required for sterilization in an autoclave. Their robust composition guarantees integrity throughout the entire cultivation process, from preparation to inoculation and colonization.
Ideal for various mushroom species and cultivation techniques, these filter patch bags are a fundamental tool for mycology enthusiasts and commercial growers alike. They facilitate reliable substrate pasteurization or sterilization and provide a sterile enclosure for spawn runs.
North Spore is committed to equipping growers with premium quality tools. These grow bags align with our dedication to scientific accuracy and practical application, helping you achieve optimal results in your mushroom growing endeavors.
Cultivate with confidence and elevate your indoor mushroom growing projects with reliable, high-performance grow bags.


Know the fit
Constructed from durable 2.2 mil thick polypropylene, these bags are designed to withstand the high temperatures required for sterilization in an autoclave. Their robust composition guarantees integrity throughout the entire cultivation process, from preparation to inoculation and colonization.
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Order preparation takes 1–3 business days, followed by 3–4 business days in transit: 4–7 business days in total. Standard shipping is free to the contiguous United States and DC, with no minimum order.
Request a return within 30 calendar days after delivery. We pay return shipping. After receipt, inspection and initiation of an approved refund take 5–7 business days.
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