Your little critter will “dig” the Zoo Med Excavator Clay Burrowing Substrate! This special clay substrate is designed to hold its shape so your reptile can dig and burrow safely. Watch on as your determined digger creates multi-level terraces and burrows in your terrarium—just like she would in the wild. Digging provides plenty of exercise and satisfaction for your reptile. Plus， it’s made with all-natural ingredients you can feel good about.