Suitable for various scenes: thermal vest to help you through the winter easily. Ideal for outdoor activities such as snowmobiling, motorcycling, mountaineering, camping, hiking, skiing, fishing, hunting or office daily and business activities. Suitable for autumn and winter use. 1. Integrated heating module. smart heating 2. Waterproof, safe and easy to wash process design 3. Infrared heating, no harmful radiation, stable performance, soft and comfortable Intelligent temperature control washable safe and radiation-free Far infrared heating No hidden danger Thin and close-fitting 1 point hot Warm and comfortable power bank power supply Anti-drilling process Long battery life energy-saving design 2 Controls----- Dual control buttons allow you to control the heating zones freely, one button controls the 6 heating zones on the front, and the other button controls the 7 heating zones on the back. By pressing the smart button on the stand collar heated vest, you can easily control the heating level, bringing you an unprecedented comfort experience. -----Exquisite inner lining with anti-static and excellent heat dissipation function to maintain unrestricted comfort and comfort in autumn and winter. With a premium zipper on the front, you can layer this unisex USB heated vest over a variety of tops for a stylish addition to a sophisticated look. ----- The smart heated vest jacket is perfect for hunting, fishing, camping, hiking, winter snowmobiling. Size S Bust: 51CM Hem circumference: 41CM Shoulder width: 39.1 110G or so Size M Bust: 53CM Hem circumference: 44CM Shoulder width: 42 120G or so Size L Bust: 55CM Hem circumference: 46CM Shoulder width: 44 130G or so Size XL Bust: 57CM Hem circumference: 48CM Shoulder width: 46 140G or so Size 2XL Bust: 59CM Swing: 50CM Shoulder: 48 150G or so Size 3XL Bust: 61CM Hem circumference: 52CM Shoulder width: 49 170G or so Size 4XL Bust: 63CM Hem circumference: 54CM Shoulder width: 50.5 190G or so