The Titan towable incorporates a convex hull constructed with a continuous rocker to reduce drag and increase speed. The front two riders sit on top in the scooped-out rider zones that provide a stable, low center of gravity. Rear two riders ride in a kneeling position and can lean into oncoming waves and rollers. A large H-shaped backrest provides extra comfort and support. Features 840-denier nylon cover, 30-gauge PVC bladder, 8 padded handles, 4 grab straps, Boston valve, and covered mesh bottom for draining. Includes peel and stick repair kit. 680-lb. weight capacity. 73"L x 64"W deflated. The Boston Valve is a screw-on, two-way valve. The bottom portion is screwed into the towable, while the top is screwed open for inflation and then tightened after inflation. Air is easily released by unscrewing the base connector. Its important not to miss a thread when screw.