Targeting the calf muscle, 2XU Calf Guards are a great muscle containment device that can be worn during training or competition. Supporting the calf muscle reduces muscle vibration allowing the calf muscle to operate more efficiently reducing fatigue and muscle cramping, increasing power and strength, and mitigating shin splint issues. The 2XU Calf Guards will protect your calves from fatigue, muscle soreness, and cramping while training and competing. Sold in pairs.