These bags can NOT be heat sterilized.
Oyster Mushroom Grow Bags are developed with the oyster mushroom grower in mind. These bags are 9" X 5" X 29" gusseted bags sealed on one end. Made from 3.0 Mil Polypropylene and have have pre-punched 0.25" holes. Oyster Mushroom Grow Bags are designed for pasteurized mushroom substrates.
These bags are black to help prevent premature pinning. Our black oyster mushroom grow bags can NOT be heat sterilized. It is best to simply wipe out the inside of the bag with rubbing alcohol prior to adding spawn and mushroom substrate.