Size Chart The CEP calf sleeves are constructed to encourage more energy, greater endurance and enhanced performance. They can reduce the risk of injury and activate the flow of blood in the muscles to support circulation. You'll see less soreness thanks to reduced muscle vibration. Features: - Comfortable top band for a perfect stay-put fit - Filament fiber for extreme durability - Heat and moisture management - Breathable fabric - Combines perfectly with the short-cut socks - Antibacterial, odor-reducing silver ions - Breathable fabric