Cascade Designs Seal Line Discovery Kayak Seat Cushion - Seal Line Discovery Kayak Seat Cushion - Increased comfort in your boat means you'll have a more enjoyable time on the water. This self-inflating kayak cushion is lightweight and contoured to fit. The low-slip polyester fabric top holds you firmly in place, and the durable nylon oxford bottom will keep the cushion performing reliably. A high-flow air valve allows the cushion to be quickly inflated or deflated. Velcro(r) tabs for make for hassle-free attachment to your existing seat.