Feature:1. 3 Heating Levels: The heated vest has built in carbon fiber heating elements and a 3 heating levels (2545), which can generate consistent heat for 11 core body parts, including the neck, back, abdomen and waist, helping to keep the body warm, promote blood circulation, and relieve muscle pain and tension.2. USB Power: The heated vest is powered by a portable charger with 2A or 2.4A USB output to keep warm. Inserted 10000mAh battery pack (not included), this heating vest can keep heat preservation up to 7 hours at low level, 5 hours at medium level and 3 hours at high level.3. Fashionable and Lightweight: With quilted, lightweight design and fine lining, you can enjoy unlimited comfort in autumn and winter. With a zipper on the front, you can fold this unisex heated vest on a top to add a touch of fashion to the delicate look.4. Washable Vest: In order to maintain the quality of the heating vest and extend its service life, please wash the vest by hand or put the vest in the laundry bag for machine washing. Place the heating vest in a well ventilated place to dry before use. Do not bleach, iron or dry clean the heating vest.5. Ideal For Winter: It is the best choice for cold winter. You can wear it to skate, ski, hunt, shovel earth, fish, hike and enjoy outdoor activities.Specification:Item Type: Heated VestMaterial: Polyester fiber, carbon fiber, cottonSize: M: Length: 66cm/25.98in Bust: 106cm/41.73in Shoulder: 42.5cm/16.73inL: Length: 68cm/26.77in Bust: 110cm/43.31in Shoulder: 44cm/17.32inXL: Length: 70cm/27.56in Bust: 114cm/44.88in Shoulder: 45.5cm/17.91inXXL: Length: 72cm/28.35in Bust: 118cm/46.46in Shoulder: 47cm/18.50inXXXL: Length: 74cm/29.13in Bust: 122cm/48.03in Shoulder: 48.5cm/19.09inXXXXL: Length: 75cm/29.53in Bust: 126cm/49.61in Shoulder: 50cm/19.69inPower Supply: USB, DC (delivery without battery).Package List:1 x Heated Vest