20 PCS Mushroom Bags with Vents, Mushroom Grow Bags Autoclavable Mushroom Spawn Grow Bag Clear Breathable Mushroom Substrate Bag with 0.2 Micron Filter Patch for Mushroom Grain (19.5 x 50 cm)

Perfect item

The bags represent good value , they strong enough to perform break n shake, pressure cook , just don’t have impulse sealer too high or they will melt if moisture is present, despite this I am still giving 5 stars rather than 4, 4.5 would be ideal score

decent make sure they don't touch the border (you wrap them with filter inside not facing the walls), some melted badly

Great for growing your own mushrooms

10/10 no issues when pressure cooking, nice thick bags, work a treat.

These work, but like other reviewers noted, seem to to go soft when in the autoclave. I put these in the Instant Pot Pro which as a canning feature (normal instant pots don't go up to 15PSI which is the magic number for sterilisation). I sealed it easily with my Foodsaver Vacuum Sealer, although I'd hoped they'd it'd actually do the vacuum thing to make them smaller for storage, but nope - straight to seal.

tougher than I expected.

Will be buying these all the time. Great size. Thanks.