Serving up fun! Knot it up! Tough exterior Resilient composure Ideal addition Voit Tetherballs are manufactured of tough durable products, inside and out. They come from a long line of tried and true sports equipment. The proud Voit craftsmanship dates back to 1922. For more than 90 years, the Voit Corporation has been cranking out high quality sporting goods at a reasonable price. Whether you’re a serious player or just want to have fun, the Voit Tetherball is the ideal centerpiece for your game. Serve it up and let the fun begin! The exterior of the ball features a durable composition cover which outlasts the competition. It’s constructed with nylon windings and a two-ply heavy duty bladder for greater air retention. The bladder is made of butyl rubber which provides a tough, airtight inner compartment. This helps the Voit Tetherball keep its shape.