Features: The mushroom growing bag is suitable for mushrooms, fungus, grains and so on. Practical The square gusset bags is designed to help increase the amount of mushrooms. Shorten Fermentation Cycle Using these bags for running spawn, and the mycelial fermentation cycle can be shortened. Labor-saving Air vent window design saves a lot of labor, you do not require drilling and oxygenation. And it can isolate bacteria via nanotechnology. Premium Material The mushroom growing bag is made of high quality polypropylene material, with high temperature resistance, durable, breathable and nontoxic. Specifications: Type: Mushroom Growing Bag Material: Polypropylene Color: Transparent Size: 50x25cm Width Before folding:13cm Width After folding:25cm Length:50cm Package Include: 50/100x Mushroom Spawn Grow Bag