Waterproof fabric is a type of material that is designed to be impervious to water. OILSKIN, oilcloth, loden, Gore-Tex, and TARPAULIN are all examples of waterproof fabrics. OILSKIN is a heavy cotton fabric treated with linseed oil, oilcloth is a cotton fabric treated with boiled linseed oil, loden is a thick woolen fabric, Gore-Tex is a synthetic fabric made from polytetrafluoroethylene, and TARPAULIN is a waterproof canvas fabric.