Diatom Bath Mat - is made of Diatomaceous Earth (DE); an absorbent material that retains water & dries quickly. DE is a natural product made from fossilized water plants. Millions of years ago in the Earth’s oceans, microscopic Diatoms took minerals from the water & created protective shells. When they died, they drifted to the ocean floor & became vast deposits. Now part of dry land, these deposits known as DE are harvested, milled, & powdered before being molded to create soil products.