8 X 4 X 18″ 4 MIL gusseted poly bags for mushroom cultivation. Perfect for expanding your oyster mushroom, and other fast-colonizing species. Pasteurized and cool straw, then mix in a crumbled Oyster Mushroom Grow kit. Stuff into the gusseted bag, close the top with a twist tie, and poke several pin holes around the bag for air exchange. When the bag is white with mycelium, cut larger holes from for mushrooms to emerge.
These bags are not autoclavable and do not contain a breathable filter patch. Made from polyethylene.