X-Socks Speed Metal Sock
Here's what other sites are saying:
Help cool your feet during a long, hot run with X-Sock's Xitanit conductive technology. The X-Sock Speed Metal Running Sock incorporates heat-conducting fibers, air-conditioning airflow channels, and supportive blister-reducing bands to keep your feet supremely comfortable, mile after mile. It sounds really techy-and it is. You'll also find that it makes a great difference.
- Backcountry Outlet