About This 2 POUNDS PER BAG: 1 pound of grain and 1 pound of manure based compost in each bag. EASIEST WAY TO GROW MUSHROOMS AT HOME: Grow the mushrooms right in the bag. HIGH YIELD: Harvest an ounce or more of dried mushrooms per bag. NO FILLER: We don't dilute our bags with wood or other cheap filler to cut costs. Don't believe the pseudoscience, wood is inferior for dung loving species. .2 MICRON FILTER PATCH AND SELF HEALING INJECTOR PORT: Far superior to taping over a needle hole, the healing injector port reduces your chances of failure. MADE WITH MAGIC IN MICHIGAN Overview Indoor/Outdoor Usage : Indoor Brand : MushroomSpawnStore.com Material Feature : Organic Color : Black Special Feature : Breathable Expected Blooming Period : Year Round Sunlight Exposure : Full Shade Unit Count : 8.0 Count Number of Pieces : 8 Style : Garden