If tennis is your go-to sport, these tennis ball stress balls are great to give out to a crowd. Muto Tennis Stress Ball is made of flexible and durable polyurethane material, extra soft and easy to grip. Squeeze the ball to improve your fine motor skills and mobility. It can also be used as therapy toys to release stress. Perfect for tennis themed party, sports game prizes, carnivals, birthday party, athletic practice drills, etc. 3 days rush available for 1 color imprint only upon request.