Our favourite mushroom grow bags. Extra thick (0.08mm) means less blow outs in the pressure cooker, as well as less melt-through when sealing. Easier to fold too! Use these to sterilize substrate, lab tools, or for fruiting: directly in the bag or by cutting a slit in the side.

These measure 20x12x50cm, and work best to sterilize 4-6lbs of substrate. We use these bags for all our personal mycology projects as they’re reliable and easier to work with compared to others we’ve tried.

These are best for substrate sterilization, for spawn check out our 0.2 micron bags.