A high merino wool content compression sock to support your calf muscles paired with one of the greatest inventions of the 21st century0 heating elements from the arch to the toe, top and bottom, for a whole new experience when you’re out in the cold. These socks are built to pair with either the Bluetooth compatible lithium pack rcB 1200 for smart phone control which gives you 14 hours of heat generation and are a particularly useful option if you want to adjust your heat depending on how active you are. Or choose the conventional lithium pack rcB 1800 with its button changed three settings and 20 hours of heat production, which is good choice if you are a “set it and forget it” type of user who doesn’t need to raise and lower the temperature throughout the day. Heated socks have opened up winter to people who poor circulation or who just hate the misery of cold toes spoiling an otherwise lovely ski day. Now you can get out there and really enjoy winter.. comfortably!