The W1 personal watercraft covers by Wake combine their snug fit with the tough 300 Denier 100% marine grade woven polyester. This fabric will not stretch or shrink and is much tougher than ordinary cotton canvas and gives your jet ski lasting protection from water, dirt and the damaging UV rays of the sun. The elastic cord is sewn into the hem and provides a snug, custom fit. All covers are water repellent, breathable and contain mildew and UV inhibitors for a long maintenance free life. The cover has a FREE quick release strap kit and storage bag.