Used DeMarini Vexxum 28 18 VXR13 Senior League Baseball Bat Gray Gold not in original package muscle fatigue in quads hamstrings and black yellow muscle fatigue in quads hamstrings and weak sore joints Thermal compression retains heat for increased oxygen consumption that aids in raising lactic acid thresholds Thigh sleeve incorporates the benefits of kinesiology tape and compression products into kinetic panels Kinetic paneling increases stability and maximizes blood flow to reduce inflammation and pain Fits left or right thigh Contains natural rubber latex Do not apply over open wounds Note: This product is not a substitute for medical care Synthetic and textile upper is end loaded bat with solid pop from what we've gathered