The graduated compression supports the calf, shin, ankle, achilles, and foot, allowing for increased blood flow and maximum muscle contained. The light padding help keep your feet more comfortable, and also feature bands of Lycra that hug the foot and keep your socks in place. The padding provides additional comfort and helps to avoid abrasion and foot stress from impact when running.15-20 mmHG69% Nylon 20% Polyester 11% Spandexbands of Lycra that hug the foot and keep your socks in placelightly padded at the ball and top of the footlight and comfortable, with breathability and moisture-wicking fabricgraduated compression supports the calf, shin, ankle, achilles, and foot