A SeatShield is made using high-tech, multi-layer fabrics that incorporate waterproof / breathable materials and is designed to go on quickly and stay in place. SeatShields have a top surface that wicks moisture away from you where it can evaporate quickly, while a middle or bottom layer provides waterproof, breathable protection. They are great at resisting odors but are machine washable. Tri-laminate material. The top surface is made of a microfiber that is comfortable even in running shorts or a bathing suit. It becomes even softer with use. UltraSport will fit any seat size.