100PCS Mushroom Planting Kit - 8"5"20" Thickened Growing Bags, 6 Mil Thick Durable, Tear Resistant, 0.2 Micron Porosity Resistant High Pressure Spawning Bags

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.

I love the thickness of the bag. They have a rigid quality to the plastic, making working with the gusset a breeze and keeping the upper bag upright, giving fruits plenty of air. Also, good price on 100.

Good for the price but the centers do not seal well for some reason and I use a high quality sealer.

I’ve never used any of the more expensive bags out there on the market, but these bags function perfectly. No contamination, bags vacuum seal in my pressure canner, no melted or exploded bags. I elevate the rack on the bottom of my 23 quart Presto With canning rings, pressure sterilize for 2 1/2 hours with 2 quarts of water, I do not surround the bags with any sort of protection against the walls of the counter, and I have zero issues. Will be buying these again and again.