Below is a selection of video clips demonstrating the Vacu-Hold system while trailering a boat on the highway:
Skier's Choice Supra	Malibu VLX
Chaparral Sunesta 244	Personal Watercraft

Commercial Sewing's Vacu-Hold system is a unique, patented design that enables a covered craft to be trailered at highway speeds... WITH NO HOLD-DOWN STRAPS!! A unique vacuum / vent is incorporated onto the cover. When the covered craft is trailered, a negative pressure is created keeping the cover tightly in place. There's no rippling, no whipping, no strap damage to hulls.