Large Dock and Post Bumper measures 50'L x 5 1/2"W x 2 1/4"D. Polyester textile cover and closed-cell foam inner cushions, not vinyl, PVC or rubber. Will not deteriorate in the sun or mar your boat. Cleans easily with liquid soap and a brush. Flexible tab (1" wide) system allows standard "top-of-dock" or unique "fold-over" mounting which conceals the top row fasteners. Flexible enough to mount on curves or around corners.