Features: 1Fast Heating: Rapid heating, using carbon fiber heating wire, about a dozen thin wire composed of a soft as silk, efficient heat production. 28 Heat Zones: Built in eight heat zones, the front plus the back of a total of eight heat zones, large heating area, strong thermal cycle to keep warm. 33 Gears Adjustment: This heat down vest features two control buttons, three gears of temperature control, and optional zoning heat. 4USB Plug: This heating vest with rustproof USB plug, universal for most cell phone charging treasure or power bank, fast charging, convenient to use. 5Washable: Not afraid of washing, can remove the rechargeable treasure, can be gently washed, support hand wash or machine wash. Do not wring hard, can extend the service life of the heating pad.Item Type: Heating Vest Material: Down, CottonSize: M: Shoulder: 43cm / 16.9in, Length: 62cm / 24.4in, Bust: 102cm / 40.2in, Hem: 100cm / 39.4in, Sleeve: 26cm / 10.2inL: Shoulder: 45cm / 17.7in, Length: 62cm / 24.4in, Bust: 104cm / 40.9in, Hem: 100cm / 39.4in, Sleeve: 26.5cm / 10.4inXL: Shoulder: 45cm / 17.7in, Length: 65cm / 25.6in, Bust: 110cm / 43.3in, Hem: 106cm / 41.7in, Sleeve: 27cm / 10.6in2XL: Shoulder: 46cm / 18.1in, Length: 65cm / 25.6in, Bust: 112cm / 44.1in, Hem: 106cm / 41.7in, Sleeve: 27.5cm / 10.8in3XL: Shoulder: 46cm / 18.1in, Length: 67cm / 26.4in, Bust: 116cm / 45.7in, Hem: 113cm / 44.5in, Sleeve: 28cm / 11.0inPackageList:1 x Vest 1 x Instruction Manual