Mens Ribbed Knee High 100% Cotton Socks (Pack Of 3) Cotton, , Sizes US 7-12, UK 6-11, EUR 39-45. Mens premium quality socks, soft top elastic for extra comfort. Please Note: All our socks that have been advertised as 100% Cotton Socks may have a trace of mixed fabric, it is advisable to take extra precaution if you are allergic to any other fabrics. All our products comply with the trading standards policy.