On Air Comfort Technology in both the seat and back of this kayak chair makes it exceedingly comfortable while also conforming to the contours of kayak seats. And, the ergonomically shaped back with specially formed lumbar support makes backaches disappear! 4 brass swivel-clips secure seat to kayaks with attachment cleats. Zippered pocket on back with drain fits 70 oz/2l hydration unit. 600D coated polyester.  Includes repair kit.