Pangea Hatch is a premium grade clay Incubation medium for reptile eggs. Pangea Hatch clay substrate is highly porous and holds many times its weight in water. It does not break down, does not compact, or float and It's color changes based on its moisture level so you can easily monitor it and add water as necessary. Hatch can be reused indefinitely by cooking or boiling to sterilize. An inert, neutral 100% natural mineral blend, this product lasts year after year without breaking down. Each particle contains thousands of internal and external pore spaces.