WONDER SOIL® is a light weight soil-less growing medium made from PREMIUM COCO COIR with guaranteed low salts. It promotes a stronger root system, faster germination and enhanced plant growth. Our products are made in various sizes and formulas for different gardening applications and expand up to 7 times their volume when water is added. The inclusion of water saving polymers allows a savings of up to 50% water, labor, and energy for up to 4 years. Our products promote exceptional gardening success for both the novice and professional.
Safety data sheets can be seen here : http://www.wondersoil.com/assets/msds.pdf