This heavy-duty semi-custom Tri-hull I/O boat cover is custom cut to securely fit boats that have windshields up to 20" high. It's constructed of heavy-duty 600-denier polyester treated marine fabric that's both water-repellent and mildew-resistant. Plus, all seams are lock-stitch and double-stitch sewn using rotproof thread for years of dependable protection. Because there are no raw edges and all seams are carefully positioned, water flows over instead of through them. Specially designed tie-down loops won't mar your boat's surface and will handle up to twice the tension of grommets. Dimensions do not include additional material for bow-mounted trolling motors. Order 1-ft. additional length to fit boats with bow-mounted trolling motors. Two-year warranty.