Castelli Alpha W 15 Sock

The Castelli Alpha Womans’s 15 Sock are perfect for cold and wet winter riding. The merino wool blend is warm and the PrimaLoft® is waterproof. The arch-support band keeps the sock in place as you pedal your bike. No sock will crease and rub against your feet. On the toe and heel where your sock gets the most abrasion, Nylon is added to ensure the sock doesn’t wear down.