For boats with windshields (including walk-thru).Super strong and easy to handle, Covermate Imperial Pro Boat Covers are made of 100% polyester 450-denier fabric that's breathable, water-repellent, and UV-resistant. Imperial Pro Covers have an exclusive venting system that offers extra protection against mildew. Tough enough for trailering, all Covermate Semi-Custom Boat Covers are tight fitting with a unique over/under tie-down system that delivers "no flap" trailering. A reflective strip at the back provides added safety when trailering, day or night. Double-stitched, double-ply seams combined with sewn-in reinforcement panels at high-wear points provide added strength and durability. Covermate Semi-Custom Boat Covers come with quick-release buckles, straps, and a unique mesh storage bag for convenience. 5-year limited warranty. For a FREE Covermate Fabric Sample Card, order item #747486. Beam: 87"" Fabric: Covermate Imperial Pro | Covermate Imperial Pro Tri-Hull I/O Boat Cover, 17'5" max. length in Blue