The Quick-Dry Earth Mat is made from a naturally occurring silica-based material, called Diatomaceous Earth. Hence the name Quick-Dry Earth Mat. In simpler terms, Diatomaceous Earth it’s a special blend of pulverized stones and algaes commonly found in waterbeds and deserts. This material is highly absorbent while being naturally resistant to mold and microbial growth, fitting perfectly into the bathroom/shower space.