Optimize your mushroom cultivation with our autoclavable Mushroom Grow Bags, designed for producing grain spawn. Each bag features a self-healing injection port for easy inoculation and a 0.2 micron filter patch that allows mycelium to breathe while preventing contamination. Made from durable polypropylene, these side-gusseted bags stand upright after filling and offer a strong bottom seal. Available in two sizes (20x12x50 cm and 25x14x50 cm), they ensure superior sterilization and lower contamination risk, making them perfect for both hobbyists and professionals.