Gush Balls | Massage Balls | Sold in Pairs. Massage Balls | Relieve pain and increase flexibility by gently kneading muscles. Built for YOU, this use-anywhere concept offers more than your ordinary foam roller. Foam rollers offer compression therapy but they don't really dig into the muscle. Foam rollers are huge and can't be used anywhere. You can throw a set of Gush Balls in your bag and pull them out virtually anytime to relieve stress. On a plane, in your car, in your house, in the gym, etc.