Our covers are constructed of ultra-durable Sur Last® fabric for the ultimate protection against fading and the elements. It is also non-abrasive, water-repellent, UV, mildew, and rot resistant. Features include Vacu-Hold® design, which creates a vacuum inside the cover during transit to draw the cover down snugly to the WaveRunner®. Benefits include reduced air-induced stress on the seams, and less aerodynamic drag.