- This battery socks upgraded to use far infrared heating elements Which can heated up quickly. Geat for cold feet. Give you a warm winter
- Soft heated socks equipped with 2 rechargeable batteries keep you warm all day especially for chronically cold feet, no more cold feet in winter.
- Voltage: 3.7 V, Fabric: Cotton, spandex, Heated Area: Front instep,Battery: Two 3.7V Rechargeable li-ion Batteries,Weight: 1.1pounds, Heat Settings: 3 Levels Temperature Settings- High Red, Medium Orange and Low Green.