The HO Sports Rad 4 Towable Tube '18 is the most versatile round aquatic device. The Rad - standing for Round Aquatic Device - allows anyone, regardless of skill level, to participate in a day behind the boat. You can put the handle in the handle hook, sit, stand, or kneel and be off to a great time. The riding possibilities are endless, opening up a world of pure imagination on for your friends and family. Fun for all ages, the RADs are guaranteed to turn some heads on your lake this summer.