Features 1. 17 Heating Zones Fast Heating: Our HOT heated vest covers 17 heating zones, built in with quality carbon fiber heat elements, rapid heating in three seconds, with strong insulation. Generate consistent heat for core body parts, including your neck, back, abdomen, and waist, helping to maintain body warmth, promote blood circulation, and relieve pain as well as tension in muscles. 2. 3 Heating Level: Three heating level(45, 35, 25) that makes it easier to heat the areas you want, or to heat certain areas hotter than others. Built-in over heated protection module, when the temperature is too high, it will automatically lower the temperature to protect your safety. 3. Easy to Use: Just attach a power bank (NOT Included) to the USB in the pocket and press the power button, the rechargeable electric vest heats up instantly and keeps warm. 4. Lightweight Design: Featuring quilted, lightweight design and fine interior lining for unrestricted comfort and coziness in fall and winter. With a zipper on the front, you can layer this unisex usb heated vest over varieties of tops to add a touch of style for refined looks. 5. Suit for All Occasions: The electric padded vest with stand-up collar can be matched with various clothes for all occasions. Perfect for outdoor activities, hunting, skiing, fishing, motorcycle, bicycle, camping, mountain climbing, outdoor attendance, office daily, etc. Specification Material: Polyester Color: Black Size: M, L , XL, 2XL, 3XL, 4XL, 5XL, 6XL Weight: 370 g, 400 g, 410 g, 420 g, 430 g, 440 g, 470 g Voltage: 5 V Battery capacity: 20000 mAH Using time: 8 hours Package Include: 1 Heated Vest(Not Include Power Bank)