Package Included: You will receive 50 mushroom growing bags, size 25 x 50 cm. The square gusset bag can help increase the number of mushrooms and can provide enough space for the mushrooms and substrate to grow and lay eggs.<br> <br> Premium Material: Made of high quality polypropylene, durable, not easy to damage , has good tear resistance, temperature resistance, it is the best choice for growing mushrooms. Can provide you with long-term use and reusable.<br> <br> Air valve window design: The design of the ventilation window saves a lot of labor. You don't need to drill and supply oxygen. Our mushroom spawning bags are designed with filter vents to absorb fresh air and prevent unwanted items from entering. With the transparent bag, all contamination situations can be quickly identified.<br> <br> Essential for mushroom planting: Using these bags for spawning can shorten the mycelial fermentation cycle. Compared with trays and pots, this kind of mushroom growing bag saves time and effort.<br> <br> Widely used: Mushroom growing bags are widely used in indoor gardens, tent or greenhouse planting, farms, etc., very suitable for growing mushrooms , mushrooms, grains and other plants.