This is a replacement seat pad for Solistice, Equinox, Prana, Sisu, and Karla kayaks, as well as some previously discontinued models. Made from 1/2" thick closed cell foam, this provides some cushion while still staying low-profile to allow for free movement with your hips while paddling. Measures approximately 14.75" x 14.25" at the widest points. Can be attached using the plastic screws from your previous seat, or adhered using contact cement if adapting to an unpadded hard plastic seat.