Sakato Mushroom Grow Bags are meticulously designed as the ideal polypropylene bags for all your mushroom cultivation needs. Built sturdy enough to withstand autoclave sterilization temperatures, these bags come in a variety of sizes for different use cases, and the grow bags feature either a 5-micron filter patch, ideal for fruiting blocks, or 0.2-micron filter patch and injection port, for optimized airflow and sterility control.