Designed for shorter distance running, sprinting, triathlons, and all field sports, the Allsports Compression Sleeves from CEP provide support and increased blood supply for your calf muscles during exercise. The sleeves feature breathable, moisture managing fabric with silver ions to control odor. The footless design allows you to wear the sleeves with your normal socks. Benefits of Compression: Every muscle cell relies on oxygen as a source of its energy. Oxygen is transported to the muscles via the blood. The better the blood flow, the better the muscles are supplied. The better the muscles are supplied, the better the muscles perform. The Allsport Compression Sleeves for the calves improve oxygen supply to this muscle group which enables faster absorption of lactic acid and accelerates muscular regeneration. The support fit also stabilizes the calves and minimizes muscle vibrations. Calf Compression is a proven remedy for the following common injuries: Shin Splints: reduces vibration, increases oxygen, and promotes healing Calf Cramps: increases oxygen to optimize muscle performance and removes lactic acid Achilles Issues: increases oxygen to the Achilles and provides padding Pulled Muscles: increase blood flow to add warmth to muscles Traveling/Circulation Issues: graduated compression prevents venous reflux and pooling Features: Anatomical fit for wrinkle-free wear Breathable, moisture managing material Odor-reducing, antimicrobial silver ions Material: 79 percent polyamid, 21 percent spandex Size II III IV V Calf Circumference 9.5" - 12" 12.5" - 15" 15.5" - 17.5" 18" - 20" Compression Sleeves combine all the advantages of Performance enhancing compression while offering additional flexibility