Exo Terra Desert Sand - 10-Pound, RedExo Terra's Desert Terrarium Sand is natural real desert sand with no added dyes or chemicals. The sand has been sifted to remove impurities and to obtain a homogenous sand grain size. Key Features : Natural desert sand, no added dyes or chemicals Creates a natural and attractive desert environment Excellent heat conductor Stimulates natural digging and burrowing behavior Suitable as egg laying substrate,