What Our Gearhead(R) Experts Are Saying:"The Bandito 2 Merino 18 Sock surprised me with how thin it actually is for a merino sock. It fit inside my shoe exactly like my summer socks do, but kept my feet noticeably warmer through a long fall ride in the mid-forties without any of the pressure or bunching I usually get from heavier winter options."The Bandito 2 Merino 18 Sock from Castelli closes the gap between summer comfort and cold-weather warmth. Thin enough to fit in your regular shoes without pressure, it brings the natural temperature regulation of merino wool to a construction that feels like your favorite warm-weather sock. The 18cm cuff keeps coverage where it counts on cooler days without climbing too high under a tight jersey cuff.