The FXC 2.0 compression socks have been designed, developed and tested by medical and health care professionals. They feature a special Micro-Nylon which is softer than most compression socks, making them easier to put on while still delivering true graduated compression for all the benefits of a well designed and fitted compression sock. Graduated compression increases circulation and provides maximum support to the tibia region and calf muscles. They reduce muscular vibration, reducing soreness and soft tissue damage, so you can work, train and play harder for longer periods of time, as well as speeding recovery time. Perfect for running, cycling, walking, triathlon, skiing, traveling and lots of other uses. Features: - Moderate compression: (20-30mm Hg) for sports and daily wear like prolonged sitting, standing, flying and travel. - Supports your calf muscles with graduated compression, boosting performance during workouts and promoting rapid recovery afterwards. - 3-D dot design adds cushioning dots for superior shock absorption and protection of the Achilles tendon. - Seamless toe closure for increased comfort - Wicks away moisture for quick evaporation - Odor-resistant - 76 % Micro-Nylon, 24% Spandex Sizing: - S/M: Fits calf circumference 12.5" - 15" - M/L: Fits calf circumference 13.5" - 16.5" - L/XL: Fits calf circumference 15" - 18"