AIRHEAD SHOCKWAVE 3 is a wave of excitement for 1, 2 or 3 thrill-seekers! Defy centrifugal force with the bonus topside stabilizer fins. They help riders stay on the tube and provide a safer riding experience, keeping riders separated The deluxe nylon-wrapped handles with neoprene knuckle guards provide a sure and comfortable grip. SHOCKWAVE has a tough heavy gauge virgin vinyl bladder, fully covered with a durable double-stitched nylon cover. It is equipped with a heavy-duty Kwik-Connect for easy and secure hook-ups. The patented Speed Safety Valves provide ultimate inflation and deflation convenience.