• High conversion efficiency, energy saving, average hourly power consumption of one degree
• Easy to cut to the size you need
• Suitable for all shoe types
• Keeps your feet more comfortable and warm
• Removable design, easy to use and easy to keep clean
• USB charging, it can be connected to a PC, laptop, or charger for charging, keeping your feet warm indoors and outdoors
• It's a nice warm-heart gift for family, parents, and friends in cold weather

Specifications:

• Material: carbon fiber
• Function: foot warmer
• Applicable gender: unisex
• Maximum voltage: 4.5V
• Heating range: within 35℃
• Insole thickness: about 4mm / 0.20''