***PRESEASON PROMOTION*** * 18" tall backrest and 2" thick seat bottom provide unrivaled support and comfort. * Comes with our detachable GTS dry bag pack for added storage. Built-in mesh bungee pouch for secure gear storage. * 6 point rear attachment system for customizable comfort. * Seat Back: 18"L x 21"W. Seat Cushion: 16"L x 18"W x 2"H