Injuries like shin splints, plantar fasciitis and foot pain can significantly derail your training and preparation for an upcoming race, marathon or triathlon. That’s why we’ve designed these Compression Running Socks to help improve recovery times and prevent those annoying injuries that plague so many of us. With 15-20 mm Hg graduated compression, our aim is to help you prevent those pesky shin splints, and with improved circulation, reduce recovery time. A cradled heel and soft snug toe box helps reduce friction and prevent blisters. Plush extra-padded sole, specifically the balls of the feet and the heel, improve the sock absorption to reduce the pounding your legs take during long runs. A reinforced arch support is designed for those prone to, or wanting to prevent plantar fascia pain. By using a moisture wicking microfiber (Nylon6), your feet will stay dry and comfortable all day long. Size: Womens USA Mens USA Europe SM 5½-8 5-7 36-38 MD 8½-11 7½-10 39-42 LG 11+ 10½-13 43-46Padded Heel, Foot and Toe Box to reduce blisters and lower the impact of long runs typical with marathon training which can cause foot pain.