The surface of the rug is made from 100% Polyester fibers, while the base of the rug is 100% cotton. Polyester fibers are a shortened name for a synthetic, man-made polymer, which, as a specific material, is most often referred to as a type called polyethylene terephthalate (PET).
It is therefore clear that it is resistant to all kinds of wear and especially to moisture. The cotton base of the rug is also particularly resistant to moisture.