Alleviate pain by performing self-massage at home with the Nike Recovery Ball. This ball is perfect for controlled relief to give you a self-myofascial massage and release, recover and alleviate pain. This helps you to recover faster and work out harder. Use it for a deeper tissue massage for both large and small muscle groups. The ball shape provides targeted relief to sore muscles and the debossed chevron pattern helps to target smaller muscles. It features high-density material to provide intense pressure yet the ball is compact with a portable design. Composition: 55% acrylonitrile butadine styrene, 43% thermoplastic elastomer, 1% iron, 1% rubber.