As a cold weather cycling sock, it's not surprising that the ever popular merino wool is the Assos bonkaSockevo7's main active ingredient. The socks also incorporate polyamide yarn for wicking and Lycra to make them gently compressive. They keep you warm, keep you dry, and promote healthy circulation. The toes and heels are reinforced and the whole sock boasts wool's antibacterial properties. The Assos bonkaSockevo7 is available in sizes 0, I, and II in the colors Black Volkanga and White Panther.