The castelli gregge 12 sock are a brilliant high performing sock which keep your feet warm and dry constructed with merino wool this castelli sock has the ultimate wicking property plus a high cuff which allows you to commute to work and ride home without the worry of getting cold and wet feet the castelli gregge sock comes in a few colours and styles so you can jazz up those winter rides castelli gregge 12 sock features fabric 65 wool 30 elastolefin olefin 5 polyamide nylon ful