Because the snow is always the best on the coldest days, we’ve upgraded this mountain legend with Omni-Heat® for even more frostnip-fighting power. Designed to capture and re-circulate body heat, Omni-Heat thermal relfective patches are aptly placed on the top of foot and back of calf to avoid high-pressure areas on this lean, high performance sock. Super toasty, naturally wicking Merino wool adds to the thermal regulation, while Omni-Wick® advanced evaporation delivers quick-drying, moisture-wicking comfort in the face of both boot leakage and sweat. Cush padding protects your shin from boot bang, while a reinforced heel and toe keep these socks going season after season.