SockGuy Crew 6in Pong Cycling/Running Socks 75% Micro Denier Acrylic Ultra-wicking acrylic blend Double-stitched heel & toe for strength & durability Easy-fit cuff & stretch-to-fit sizing for a perfect fit Great for running, athletics or just kickin' back Size L/XL: Men's 9-13, Women's 10-14, Euro 43-48