100 packs of 15 X 35 cm planting bags provide enough space for mushrooms to grow and lay eggs, and the substrate and fruit. These breathable bags with side flaps can stand and stay strong. Tear resistance: Extra thick 6 mil bag, designed to withstand the high temperature brought by sterilization. High temperature resistance 121-125 Excellent filtration function 2 Micrometre filter membrane can freely exchange gas while avoiding pollution. Transparent bag helps to quickly find any examples of contamination Compared with mushroom growers, compared with trays and pots, the use of these bags can greatly reduce the space required for mushroom cultivation or spawning Can be used for medium inoculation of mushroom oyster spawning, cloning oyster mushroom, etc. Thickness: Extra Thick 6 Mil Bags Sealing :Our these mushroom bags can be sealed with an impulse sealer, or just tie to seal . these bags are durable and can be reusable in most times. Water content of culture material: If the water content of the medium is too high, the ventilation will be affected, hyphae will grow slowly due to lack of oxygen, moisture will be deposited in the lower half of the cultivation bag, and the hypha length will not be able to go. size:15x35cm Material:PP colour:Transparent Package Contents: 100 x Mushroom Grow Bag Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.