Kawasaki has selected the Vacu-Hold trailering system. This unique patented design allows your JET SKI watercraft to be trailered at highway speeds with no hold down. A specially designed vacuum/vent is incorporated onto the cover so that as the covered machine is trailered, a negative pressure is created to keep the cover tightly in place. No rippling, no whipping, and prevents strap damage to hulls. Additional hold down J-channels clips are provided, these may be used when trailering behind a vehicle causing extreme turbulence. Patented Vacu-Hold vented trailering system. Durable Marine grade Sur Last polyester fabric. Ultra-Violet, mildew-resistant. Water repellent. Zippered openings for access to tie down cleats