"The Classic Accessories StormPro Heavy-Duty Boat Cover is designed for both long-term storage and highway travel. High-strength 600D polyester StormPro marine canvas offers extra durability and all-weather protection. Resists mildew, UV damage and is water repellent. Dual rear air vents reduce inside moisture and ballooning of cover at high speeds. Elastic Bottom Yes, Material Thickness denier 600D, Storage Bag Included Yes, Fits Boat Style V-hull runabouts, Fits Beam Width in. Up to 102, Color Gray, Fits Length ft. 17-19, Material Type Polyester, Tie-Downs Included Yes. Integrated buckle and strap system for easy fitting and trailering Full cut allows extra room for accessories Heavy-duty fabric for maximum water resistance and repellency Support pole prevents water from pooling and help preserve cover"