Zoo Med Creatures Creature SoilZoo Med Creatures Creature Soil is a proprietary blend of peat moss, soil, sand, carbon, and other natural materials that provides a safe and beneficial substrate for invertebrates and live plants. It increases humidity and promotes natural burrowing behaviors in spiders, insects, and more. Proprietary blend of natural materials, including peat moss, soil, sand and carbon Increases humidity and promotes natural burrowing behaviors Ideal for spiders