Custom-Fit Over-the-Tower Boat Covers are made to a specific year, make and model boat, providing a snug and contoured fit. Each cover features a dual zippered entry for easy access to the boat while covered with a special protective strip behind the zipper to protect the boat, a 1/4" draw rope in them and two rope ratchets. Also suitable for mooring if access is available on both sides of the boat to properly secure the cover to the boat using either suction cup tie-downs or mooring bags (sold separately). The draw-rope will exit on both the port and starboard side.