Unique Pasteurization Technique: Our specialized method balances nutrient retention with contamination prevention, ensuring robust mushroom growth without the nutrient loss seen in full sterilization. Optimized for Maximum Yield: Crafted by expert mycologists, our substrate supports diverse growing setups—monotubs, tents, bag tek—and is designed for ideal water retention and nutrient balance, promoting optimal mushroom development. Ready-to-Use Convenience: Each cvg substrate grow bag arrives pre-hydrated and pasteurized for immediate use, made from a consistent blend of coco coir, vermiculite, and gypsum. Just add your inoculated (fully colonized) spawn to start growing! Advanced Climate Control: Featuring a dual-sided 0.5 micron filter, our grow bags optimize fresh air exchange and moisture retention, creating the perfect environment for your mushrooms to thrive. Reliable and Supportive: Designed for long-lasting room-temperature storage with a full replacement guarantee and expert customer support, our substrate bags are crafted to elevate your mushroom cultivation journey. Olympus Myco pasteurized mushroom substrate is the perfect choice for growers looking for a reliable, high-quality substrate made from natural and sustainable materials. Our mushroom substrate is carefully crafted from a blend of coco coir, vermiculite, and gypsum, all of which have been selected for their ability to promote healthy mushroom growth. Our substrate is designed to provide optimal growing conditions for a wide variety of mushroom species, including shiitake, oyster, and more. The coco coir component of our substrate provides excellent water-holding capacity, while the vermiculite promotes proper aeration and drainage. Gypsum is added to provide essential nutrients and minerals that your mushrooms need to grow strong and healthy. Our substrate is carefully pasteurized to ensure a healthy growing environment for your mushrooms. Plus, it comes in a convenient, ready-to-use bag, saving you time and effort in preparing your growing medium. With our premium pasteurized mushroom substrate, you can achieve maximum yields and high-quality mushrooms that are sure to impress. Whether you're a seasoned grower or just starting out, our substrate is easy to use and provides consistent, reliable results.