WOW World of Watersports, Inflatable Aqua Treadmill, 48" Center Height, 1 to 3 Person Human powered vehicle for the water, patented sprocket system allows speeds up to 10 mph Steer by putting all of your weight on one side or the other Cushioned cockpit makes a great covered lounge Steerable, 8 drainge ports Has grommet and includes 10 feet of rope for tying off