The Dakine XT Seat Windsurf Harness is a fully built-out go-to seat harness. This substantial seat harness features a pre-curved inner support structure with featherweight foam molded lumbar pad offering plenty of back support and performance. The XT Seat is loaded with features including an 8-point load dispersion system, comfortable leg cinch straps and the easy-in easy-out push button windsurf spreader bar with added padding for long days out on the water. Dimensions are: XS= 28-30'' (71-76cm) SB= 8'' (20cm), S= 30-32'' (76-81cm) SB= 10'' (25cm), M= 32-34'' (81-86cm) SB= 10'' (25cm), L= 34-36'' (86-91cm) SB= 10'' (25cm), XL= 36-38'' (91-96cm) SB= 12'' (30cm). Material: Marine Grade Vinyl.