I have the Gerbing Sock...nice..but wired...
Here is another alternative...No I do not own them but found others that do..
Columbia Sportwear Men's Bugathermo™ Techlite™
http://www.columbia.com/Men%27s-Bugathermo%E2%84%A2-Techlite%E2%84%A2/BM1451,default,pd.html#Last season, we introduced the Bugathermo, the first high-performance winter boot with an integrated heating system. This season, we’re offering the same revolutionary technology in a lighter package for the ultimate combination of warmth and mobility. more less Built with Columbia’s most advanced technical winter boot tooling and a lightweight cushioning footbed and midsole, the Thermo Techlite features built-in rechargeable batteries and electronic controls that provide a dynamic “singular” heating system to regulate heat around the foot for hours of warm comfort. With a lightweight waterproof thermal rubber shell and rustproof alloy gaiters, the Bugathermo Techlite is ready for serious mountain trekking, snowmobiling, ski lift operation, or Arctic exploration. Combine these features with the Bugathermo’s trusted durability, 200g Thinsulate® insulation and Omni-Grip® traction, and you have serious winter warmth without the weight.