SockGuy Classic 6in Ride Clean 2014 Cycling/Running Socks (Ride Clean Crew 2014 - L/XL) Size X-Large 10% spandex 75% moisture wicking micro denier acrylic, 15% nylon, 10% spandex Mesh upper above your foot allows maximum ventilation and breathability Easy fit cuff features a non-binding cuff Stretch -to-fit, 2 size system Warm weather sock