Women's Heated Vest Size:S A: A 5V 20000mAh battery

A: A 5V 20000mAh battery is approximately 100Wh — at the airline carry-on limit

Do not machine wash — the heating wires and battery pocket need to stay dry

4V battery (sold separately)

Important: only use 5V 2A USB batteries — other voltages can damage the heating elements

Q: Can I wear it under a winter coat

Women's Heated Vest Size:S A: A 5V 20000mAh batteryHigh Quality Material Featuring soft nylon surface material, which feels comfortable to touch and easy to clean. Its lightweight insulation allows for unrestricted movement and multiple styling options. This vest has a new Mylar Thermal Lining that helps retain your body's heat Whether you're walking your dog in the brisk autumn air, tailgating for your favorite football team, layering under your winter jacket, or battling a freezing office, this vest