Super comfy and warm rib cushioned alpaca socks. Designed for everyday wear and cold feet! Long lasting, insulating and extremely comfortable, they can be cold machine washed and dried. The alpaca content provides sweat-wicking properties and the sock has just enough elastication to ensure a perfect fit and durable shape. UK 7-10 / US 8 - 12 roughly This product is available in One Size - average men's foot size, but also suited to ladies with larger feet.