100PCS Mushroom Grow Bag Large Thickened 8"x5"x20" Autoclave Resistance Bag -6 mil Thick Strong Tear Resistance-0.2 Micron Filter Mushroom Spawning Bag, Mushroom Planting Bag (8*5*20"-100pcs)

High quality bags withstand 15psi for 2 hours. Great for grain and fruiting blocks.

I have tried many different mushroom bags and these bar far were the absolute best! Their thickness was obvious when compared to others. Realize that when vendors declare the MM thickness of the bags, SOME of them base that on the ENTIRE bag folded. In other words they are telling you what two sides are equal to in MM thickness rather than the thickness of just one side. This is misleading. These bags are nice and thick. Hold up in an autoclave.

Excellent results with these bags, holds up to autoclaving. I don’t have an impulse sealer but I can use my vacuum sealer and reinforce the seal with a strip of duct tape.

These are honestly the best mushroom bags I have found on Amazon. There is no rivalry

I wish the sides of the bags were sealed differently so that there weren't such large pockets on each side. The grain tends to get stuck in between the folds and it takes more alcohol to sanitize the crevices. I also would get bags with injection ports that are sealed in between two layers of poly. I don't like the thought of the micropore tape possibly getting wet when I'm agitating the mycellium.