Features: Booster Ball designed to make your towable tubing experience easier Modeled after an inflatable buoy with a tow rope connected to both ends Design keeps the rope elevated to boost visibility and absorb shock to minimize drag and enhance your boat's fuel economy The ball can also extend the life of your towable with the simple design reducing stress on the tube and its cover It prevents the rope from getting caught in the wake Designed for 1 to 4 rider towables 4,100 lb. break strength Entire ball is covered with double-stitched nylon to ensure both comfort and years of use Patented simple speed safety valve for quick and easy inflating and deflating