Creates a natural and attractive desert environment Excellent heat conductor Stimulates natural digging and burrowing behavior Advantages that leave sand in the dust! Recreate a reptile's desert habitat with attractive, 100% natural ground English walnut shell. It's lighter in weight than old fashioned sand, and dust free for a healthier home environment. Won't scratch cage glass. This material is made in the USA, and can be readily composted with everyday yard waste.