Women, Men Sleeveless V Neck Zipper Heated Vest

Powered by any 5V/2.1A power banks, USB plug compatible with most power banks in the market. The time of last heating depending on how many areas and the heat levels you are using. With all areas on and set on high, it lasts 4+ hours. With less areas and lower heat settings used, it can last 10+ hours 5 carbon fiber heating elements of battery heated vest generate heat across the abdomen, waist and upper back then warm to the entire body gradually. Warming heated vest not only can help promote blood circulation and metabolism, but also relieve rheumatism, muscles, shoulder and back discomfort in some extent. Our sizes are based on the person wearing our product over normal clothing. If you are wearing bulky sweaters, sweatshirts or multiple layers please consider ordering 1-2 sizes larger depending on what you normally would wear under your coat. Reference size bust, XXS 33.86"/86cm, XS 35.43"/90cm S 37.01"/94cm M 38.58"/98cm L 40.16"/102cm XL 41.73"/106cm 2XL 43.31"/110cm XXS (Label is M), XS (Label is L), S (Label is XL), M (Label is XXL),