Castelli Aperitivo 15 Sock

The natural warm of wool mixed with recycled polyester provide a breathable warm sock, making the Castelli Aperitivo 15 Sock great for cold weather riding. Wool keeps your feet warm while the stretchy, breathable polyester dries sweat inside a cycling shoe. Arch-support band holds sock in place as if it were a second skin and Nylon heel and toe preserves the sock from wearing down on many miles of bikes rides.