X-Socks Ski Metal Sock
Here's what other sites are saying:
Just coming in contact with your skin is enough to activate the X-Socks Metal Ski Sock. Tiny metallic shimmers reflect heat like an emergency blanket, keeping it at a natural temperature without accumulating so you dont overheat. A soft merino blend and strategically placed reinforcements pad contact points, and an X-ribbon adds ankle support.
- Backcountry.com refers to the men's version