About This Coconut Coir Substrate: The coconut fiber substrate measures 7.87 x 3.94 x 1.57 inches/block, is made of shredded coconut shells, with a soft, absorbent texture that stimulates natural digging and burrowing behaviors in reptile Odor Absorption: Natural reptile bedding helps to break down odors from feces, urine, or other causes, which can be a great way to reduce odor emission, keep indoor air fresh, and provide a wonderful home for your reptiles Simulates a Tropical Environment: Coconut substrate controls the humidity of the environment very well, if you find it starts to get dry, simply spray with a moderate amount of water to continue to keep it moist Easy to Use: The substrate for the reptile tank is simple and easy to use, simply soak the coconut bricks in water and the coconut substrate will absorb the water and expand into a clean, very soft, and comfortable terrarium bedding Ideal Choice: one coconut brick soaks up to 5-8 times its original volume, perfect for covering tanks or glass containers, it's an ideal accessory for terrapin habitats, ball pythons, snakes, turtles, toads, lizards, and other reptiles Note: Coconut bricks need to be soaked in water to expand before they can be used. The amount of water absorbed by the coconut bricks will depend on the amount of humidity you need, add water as needed