MOC Pile Ankle One of the few sport-style socks at Anonymous Ism, the MOC Pile Crew features a cushioned sole with pile knitting for added comfort. Support is woven in at the heel, ankle, and arch for a secure fit, while nylon reinforcements from heel to toe enhance durability, making these socks both comfortable and tough. Construction : Pattern knitting Composition : 35% Cotton 35% Acrylic 7% Nylon 11% Polyester 2% Spandex. COO : Made in Japan Size guide : Size Medium : Fit best for 25-28cm feet, approximately US Men's size 7-10 Size Large : F it best for 27-30cm feet, approximately US Men's size 9-12