HO Shark Ski TubeThe Shark is a 3 rider towable tube built for fun days on the lake. The Shark can handle up to 3 riders but it can be ridden by 1, 2 or 3. HO Shark Ski Tube The Shark is a 3 rider towable tube built for fun days on the lake. The Shark can handle up to 3 riders but it can be ridden by 1, 2 or 3. The center rider sits on the deck of the tube while the outside riders lay in the prone position. Built with only the finest materials and guaranteed with our