These bow caps consist of 2 pieces. Bow Cover and Bow Cap. The bow cover is made of black Vinyl material that fits over the front of the hull and covers the ends of the tubes. The Bow Cap/Nose Piece is made of black ABS and attaches to the bow cover. They then attach to the hull with a Shock Cord/Bungee Cord which hooks into the grommets located in the hull of the boat. While this adds a nice finished look to the boat it also helps to keep the boat nice and dry.