Graduated compression sleeves help?improve blood and oxygen circulation in your legs and feet. The compression fabric helps reduce muscle vibration which could cause soreness and fatigue. Mueller® Graduated Compression Calf Sleeves feature: Odor resistant, antimicrobial Moisture management material Extremely durable fabric Breathable performance Mueller® Exclusive HYDRASHADE™ UV Protection fabric UPF 50+ To use, place thumbs inside the sleeve and gather the material. Slip your foot through the sleeve, so the bottom of the sleeve rests on your ankle. Gently slide sleeve up the rest on the calf. Smooth out any bunching or wrinkles.