Our 8-Pack All In One Mushroom Grow Bags provides 24 lbs of ready-to-use substrate for mushroom cultivation. Each 3-pound bag features three layers: rye grain at the bottom for inoculation, a nutrient-rich straw layer in the middle, and manure-based substrate on top. Fully hydrated and sterilized, these grow bags offer an all-in-one solution for strong mycelium colonization and fruiting. Perfect for growers seeking a convenient, comprehensive substrate solution, this bulk pack is designed to streamline the cultivation process.