Zilla Desert Blend Ground English Walnut Shells Reptile BeddingZilla Desert Blend Ground English Walnut Shell is a sand substitute developed for desert dwelling reptiles. Made from ground English walnut shells, it provides an attractive terrarium bedding. If ingested, this substrate will pass easily through your reptiles digestive system. Ideal for Bearded Dragons, Monitors, Skinks, Uromastyx Creates a natural and attractive desert environment Excellent heat conductor Stimulates natural digging and burrowing