Harmony Comfortlift Seatpad, Grey/Black 1/4 inch thick, non-absorbent, closed cell foam Peel and stick adhesive backing Easily cut to fit a variety of kayaks (.65cm) thick closed cell foam Does not absorb water Peel and stick adhesive backing Easily cut to fit a variety of kayaks 15 by 16 by  (38cm x 41cm x .65cm)