Item Type: Heated VestMaterial: Polyester, Carbon Fiber, CottonPower Supply Mode: USB, DCSize: M: Length: 64cm / 25.2in, Bust: 104cm / 40.94in, Shoulder: 40cm / 15.75inL: Length: 66cm / 25.98in, Bust: 112cm / 44.09in, Shoulder: 41.5cm / 16.34inXL: Length: 68cm / 26.77in, Bust: 116cm / 45.67in, Shoulder: 43cm / 16.93inXXL: Length: 70cm / 27.56in, Bust: 120cm / 47.24in, Shoulder: 40.3cm / 15.9in 13 Heating Levels: The heating vest supports 3 heating levels(35?55), can generate heat for neck, back, abdomen, waist and other body parts, and relieve muscle tension. 2Power Supply: 2A or 2.4A USB output, inserted with 10000mAh battery pack (not included), can keep heating up to 7 hours at low level, 5 hours at medium level, and 3 hours at high level. 3Fine Workmanship: With quilting, lightweight design and fine lining, the electric heating vest has great comfort, and the front has a zipper, the heating vest can be overlapped on various top. 4Applicable Scene: Perfect for winter. You can wear it to skate, ski, hunt, shovel, fish, hike, and enjoy the outdoors. 5Precautions for Wash: 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. Do not bleach, iron or dry clean the heating vest.