This APS Lightning Mooring Cover is designed to cover the topsides while the boat is rigged with the boom in the upright position. This cover is enclosed at the transom and has full hull side skirts. Zipper closures are included at the bow, shrouds and transom. Tie down straps with quick release buckles are sewn along the bottom of the cover so that it can be secured. Reinforcements are sewn in at all chafe points. Breathable Top Gun Polyester.