Airhead Viper 2 Two Person Towable Ski Tube Grab a friend and hit the water with the lively and stable Viper 2 Towable Tube from Airhead. This cockpit style towable features a boat hull shaped bottom that delivers unparalleled stability while riding. Inflatable backrests lend extra support while providing all day comfort. The Viper 2 tube is a great entry-level boat tube, and is perfect for young children who need a more secure ride. Constructed with durable 30 gauge bladders that are completely