Nylon Imported As you tighten the body straps, the inner mesh panel expands, providing air flow to your back and keeping you cooler while paddling and fishing Low profile front foam and sculpted upper back allows full range of motion Thin back foam accommodates most canoe and kayak seats Shoulder adjustments with airprene comfort pads & shoulder webbing tuck aways Two large pockets with stretchable airprene panels accommodate necessary gear and allow drainage