Face it, stowing a tube on small boats, ski boats and PWC's can be a hassle! We designed Surf with these watercraft in mind. Despite its small size, 50" x 40" x 6", Surf is big on performance. Sit on top or lie down, either way, you'll love the remarkably stable ride. Four deluxe handles with neoprene knuckle guards provide a great grip. SURF is equipped with a Boston Valve for fast inflating and deflating, 2 boarding straps and a drain vent. waterskiing-towables