The Castelli Quindici Soft Merino 15 Socks are made from a soft, warm wool blend that will keep your toes cosy when it's cold out. Merino wool is also great at wicking, so no matter how hard you cycle, your feet will stay dry and fresh. Add in an arch-support band and a reinforced heel and toe, and you have a long-lived sock that will safeguard your foot health as you ride.