Sub Sports Elite RX Mens Compression Calf Guards - Black Graduated compression leggings for high-intensity, high-performance use. Graduated compression leggings for high-intensity, high-performance use. Increase muscular power & endurance - compression fit improves blood flow and oxygen supply to your leg muscles. Stay dry - moisture-wicking fabric transports sweat away from the skin and reduces chafing. Shorten recovery times - graduated compression fit reduces the build-up of lactic acid in your muscles.