GTS Expedition Molded Foam Kayak Seat - Water Bottle Pack Comfortable Padded Kayak Canoe Boat Seat Fishing Seat Adjustable Backrest Back Support Seat ***SEASONAL PROMOTION*** 18 tall backrest and 2 thick seat bottom provide unrivaled support and comfort. 6 point rear attachment system for customizable comfort. Comes with GTS Water Bottle Pack. Built-in mesh bungee pouch for secure gear storage. Seat Back: 18L x 21W. Seat Cushion: 16L x 18W x 2H