The Q36. 5 Termico Socks build warmth from a pure wool fiber, holding a creaseless fit that keeps the sock from bunching inside a winter shoe. Wool's natural insulating properties give the sock steady warmth through a cold ride without adding synthetic bulk. What Our Gearhead(R) Experts Are Saying:"The wool keeps my feet warm on a cold ride without ever feeling clammy, even once I've been out for a couple hours."