The EVA Trackpad is a PVC reinforced foam seat pad which clips securely onto the seat. The foam surface provides cushion for more comfortable paddling. The extra support allows stronger leg drive. Disclaimer - Though this product clamps onto the seat extremely well and works perfectly for 90% of all boats, it is not compatible with a few models of boats with larger seats. We provide a 30 day return policy for seat pads that do not fit the benches. Returned seat pads must be new or like new.Keep product out of prolonged sun exposure. We are not responsible for intense heat damaged seat pads.