What Our Gearhead(R) Experts Are Saying:"I wore these on a string of cool morning rides where cold feet usually ruin the first hour, and that just didn't happen. They fit comfortably inside my regular cycling shoe without feeling stuffed."Cold feet have a way of ruining a ride long before the rest of the body notices the chill, and Castelli built the Scorpion Logo 15 Thermal Sock to keep that from happening. We love how the PrimaLoft yarn manages moisture while holding warmth, all inside a mid-weight build that slides right into a cycling shoe without adding bulk.