- Zipper pocket for power bank storage, more convenient when going out.
- There are 7 different sizes available, suitable for different body size to choose.
- USB interface USB‑5V/2A power supply interface, can be connected to the power bank for use.
- High quality heating material carbon fiber to make the electric heating quickly smoothly without radiation.
- Elastic waistband is comfortable, not too tight and durable to long term using.