These calf guards use 2XU’s exclusive 50D/CK fabric and protect against leg fatigue and muscle soreness. The top edge features an added silicone elastic hem to maintain the calf guard in place. An essential training tool for people who need extra support through their calf region when working out, they allow an athlete to wear their favorite running socks while providing additional calf support. They may also be worn under a wetsuit for faster transitions.