Rechargeable Heated Insoles

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: BlackMaterial: Carbon FiberFunction: Foot WarmerApplicable Gender: Unisex MaximumVoltage: 5VHeating Range: Within 35 Shoe LineInsole Thickness: 4mm / 0.20'' (appr.)Package Includes:1 Pair * Heated Insoles1 * USB Cable