Reduces drag for better gas mileage. Oval shape helps absorb shock. Lightning valve allows fast inflation/deflation times. The item "O'Brien Shock Ball Towable Tube Rope Float Boat Tubing Water Sports Pull Roping" is in sale since Sunday, April 25, 2021. This item is in the category "Sporting Goods\Water Sports\Wakeboarding & Waterskiing\Tubing & Towables". The seller is "kkssalesunlimitedllc" and is located in Owingsville, Kentucky. This item can be shipped to United States.