Cw-x Women's Muscle Support Compression Calf Sleeves 80% Coolmax/20% Lycra Imported The CW-X patented compression support sleeves reduce fatigue, promote recovery and support calf muscles Our "Support Web" help muscles and ligaments band together to support the calf AND the shin muscles Graduated compression enhances blood flow, reduces lactic acid build-up and enhances recovery EXO-stretch fabric helps to keep the body cool and dry Custom support band across shin muscle addressing shin splints