LOSTRONAUT 60-Pack Mushroom Grow Bags | Extra Strong Large Size Breathable Autoclavable Spawn CO2 Bag for Growing Mushrooms | Tear-Proof 6'' x 5'' x 20''.2 Micron Filter, 4.8mil

Thank you

These are sturdy, have held up well at 15 psi for 120 minutes, and are the perfect size to pack 6x 3lbs bags into a 23 Qts pressure cooker. Ordering more!

Will pop / burst during sterilization, very thin mil, melts during sterilization. Unused Bags have holes/rips, Defective bottom seals on bags and bags prone to popping under 15psi x 90 or 180min sterilization. Not worth wasted money, time, effort, excess waste…

Was hesitant at first due to the lack of reviews but this is a great smaller size bag for general purpose grain spawn work if you want faster colonization. Grain spawn pictured was 3.5 pounds of whole oats and the brown bags are 4 pound hardwood fruiting blocks (reishi grains spreading after a day!). Bags held up to 2 hours at 15psi very well and 95% of bags had no deformations at all. For some reason a few of the bags formed a bubble the size of a quarter on the side that made the plastic as thin as a shopping bag in that one spot after cooking, but cool and colonized they have not torn or contaminated even after shaking and breaking up grains. All bags held a seal/vacuum after sterilizing very well 2 days after cooling and none had contamination. As long as you use proper technique, and watch moisture/ hygiene especially, your mycelium will grown wonderfully like seen in the pictures. Once your bag turns white, give top half a light squeeze and smell the sweet mushroomy aroma (one of my favorite parts :)

Just as title says. The bags are durable in a PC for 3 hours at 15psi. No reason to go longer than that.