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)

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

Great for growing your own mushrooms

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

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

These bags are fine if you're just getting into mushroom growing, the price is cheap so you don't feel bad messing up your work as you're learning. That being said, the quality of them isn't great, it's hard to describe but it's as if they barely make it out of the sterilisation process. As if they slightly melt or lose their flexibly properties, and then they re-solidify after cooling, but become creased, warped and easy to break. Additionally they are also poor for use in impulse sealers, so you're better off cable tying the top rather than impulse sealing. The filters are ok best I can tell.

tougher than I expected.

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

My impulse sealer melts holes in these However they do go through sterilisation just fine so I'll be reusing them. I'm simply having to be super careful with the impulse sealer: micropore tape folded over to top, a bunch of low temp poor seals, then folding it several times, and taping down the folds. I'm not confident it's very good at this still, but for 1/3rd the price of the competition I'll take it I don't really trust the air filter either so I put micropore tape over it too, no clue if that's needed Edit: I'm downgrading this from three to two stars now, I've had the bags tear two times in a row now which is extremely frustrating. I think I'm just going to have to start buying more expensive bags