SAFETY & SMART---The heating clothes can ensure that you enjoy warmth in the cold winter. Heated underwear can be connected to any output: 5V/DC, it is very simple and easy HEATING ZONES---Heated underwears with heating pads will warm you across core body areas (axillary, shoulder, back, belly, wasit, elbow, knee, buttock, tight, calf) to make you feel warm in cold winterCotton Fastening: Other Relaxed KEEP YOUR BODY WARM---Built in with quality carbon fiber heat elements and 3 heating levels to generate consistent heat for core body parts, helping to maintain body warmth USB POWERED---Powered by any 5V portable charger USB plug compatible with the most portable chargers in the market. ( NOTE: Not incluede MOBILE POWER BANK ) USED IN VARIOUS SCENES---The Heated vest allows you to enjoy outdoor activities in the cold winter, such as riding a motorcycle, golfing, camping, hunting, fishing, skiing, hiking, etc