The optimum value in recreational floating water mats. Rubber Dockie's are a safe and wholesome boating accessory that anyone can enjoy. Make a normal day on the water into a lifelong memory. Rubber Dockie's are constructed of premium closed cell foam. The tuff-hide outer membrane treatment provides surface protection while the tear-stop nylon inner rebar matrix prevents rips & punctures. 18 feet x 6 ft. High grade 2 ply closed cell 1 3/8 inch foam includes 12 ft. Bungee tether pair of velcro storage straps tuff-hide outer membrane tear-stop nylon inner rebar matrix.