The Airhead 4K Booster Ball Towing System helps everyone beat the heat and boosts fun, thrills, and spills on the water. With a total length of 60 feet, this system includes the inflatable 4K Booster Ball with a rope connected to both sides to keep the tow rope out of the water. Designed for one to four-person towable tubes, this Booster Ball system improves the performance of most tubing tubes and Sportsstuff's all-new Doubles. With Airhead's 4K Booster Ball Towing System, effortless towing is now available.Key Enhancements: Reduces rope spray Less stress on the tube and cover Higher visibility of tow rope in the water Reduces drag and acts as a shock absorber, enhancing fuel economy Tow rope is less likely to get caught in water or boat wake especially in turns Great for low transom tow points