Cotton Yak Knee SocksThese high gauge high socks use yak and organic cotton. While they softly tighten, theyre stretchy and fit well. They do not easily slip off and can be used like long hose for business uses. The seam at the toe uses the linking sewing, and a pattern using indigo dyed yarn adds some extra flair. Size Medium: 25 27cm (EU 39 44). Fabric Organic Cotton 72%, Yak 18%, Nylon 7%, Polyurethane 3%. Made in Japan. Care Cool gentle machine wash using a laundry