1″ memory/closed-cell, dual-density foam seat for exceptional comfort. 1/2″ closed-cell foam seat back. Special straps, quick-release buckles and swivel-clips (vary by model) secure chair to canoe seats or S.O.T. kayak attachment cleats. 420D coated ripstop nylon shell. Adjustable back for individual comfort Chairs detach quickly from boat for use on beach or in camp. Lifetime Limited Warranty. Dimensions: 27″ x 15.5″ / 68 x 39 cm Weight: 24 oz / 680 gr Whether you’re just out for the afternoon, or on a multi-day trip, in your canoe, sit-on-top kayak, or inflatable boat , our Water Line Chairs give you the utmost in back support, seat comfort and durability every time you venture out. And these chairs work great outside the boat , on the beach or in camp! Removable bottom support stays allow chair to conform to molded, contoured canoe seats. Convenient back pocket holds stays. Works with most canoe seats.