Castelli Wool Transition 12 SocksWhen putting in the time on the saddle in cold weather you'll want to stay as comfortable as possible to keep riding fun during the colder days when motivation to get out the door might get harder to find. Luckily the Castelli Wool Transition 12 Socks will help you take that first step. They're made from Merino wool and silk blend for maximum breathability and superior moisture wicking properties wool is known for. The medium weight is ideal for the cool weather and even stays comfortable with tighter fitting shoes.FEATURESMixture of Primaloft(R) and polypropylene yarns to keep your feet warm and dryTerry-cloth construction for extra loft and warmthSizing (Euro/US)SizeSmall/MediumLarge/Extra LargeXX LargeMen's Shoe Size36-39 / 4-740-43 / 8-1044-47 / 11-14Women's Shoe Size35-38 / 5-739-41 / 8-1042-43 / 11-12 | Castelli Wool Transition 12 Socks Men's Size Small/Medium in Black