Name:Crossfit Massage Lacrosse Ball Gym Home Exercise Rubber Solid Ball Relax BodyFunction:Comprehensive Fitness ExerciseModel Number:lacrosse ball hockeyMaterial:rubberSize:63.5mmCrossfit massage ball relax your muscleThe Simplest Way to Increase MobilityIf there's one thing you should implement to increase mobility it's a lacrosse ball. It's great for breaking up muscle knots and hard to reach trigger points. Use the Lacrosse ball on your traps and delts after a heavy upper body workout or on glutes and calves after a long run.