USB Heated Warm Sock Foot Insole, Winter Washable Thermal Insoles, Unisex

Features:
1. High conversion efficiency, energy saving, the average hour with one degree of electricity.
2. Easy to cut to the size you need.
3. Applicable to various shoe types.
4. Make your foot more comfortable and warm.
5. Removable design, convenient and clean.
6. USB charger, connected to PC, laptop, charger, keep your feet warm indoor.  

Specifications:
Color: Black
Material: Carbon Fiber
Function: Foot Warmer
Applicable Gender: Unisex Maximum
Voltage: 5V
Heating Range: Within 35 Shoe Line
Insole Thickness: 4mm / 0.20'' (appr.)

Package Includes:
1 Pair * Heated Insoles
1 * USB Cable