Upgraded heating elements generating heat from the abdomen and back to make you feel warm in 360 degrees. One button for 3 heating settings, made of soft skin-friendly material which ensures smooth and comfortable feeling. Features: Activates various functions between skin and promotes metabolism. Vitality restoration: it provides deeper adjustment of physiological functions to avoids sub-health state and restore the vitality. Set the temperature you want to respond to a variety of environments. A button to heating, three stall temperature control, intelligent heating. General USB interface, longer service time. Comfortable and breathable, and it's a nice partner for your winter going out. The product can be soaked and washed as a whole, and the power interface is treated with insulation and waterproof. Specifictions: Size: M, L, XL, 2XL, 3XL, 4XL, 5XL, 6XL (optional) Color: black Main material: polyester Interface: USB Temperature shift: Warm: 45-55 Degrees (Red Light) Comfort: 38-45 Degrees (White Light) Energy saving: 35-38 Degrees (Blue Light) Length: M: 660mm L: 680mm XL: 700mm 2XL: 720mm 3XL: 740mm 4XL: 760mm 5XL: 780mm 6XL: 800mm Shoulder: M: 444mm L: 456mm XL: 468mm 2XL: 480mm 3XL: 492mm 4XL: 504mm 5XL: 516mm 6XL: 528mm Bust: M: 1.08m L: 1.12m XL: 1.16m 2XL: 1.20m 3XL: 1.24m 4XL: 1.28m 5XL: 1.32m 6XL: 1.36m Hem: M: 1.04m L: 1.08m XL: 1.12m 2XL: 1.16m 3XL: 1.20m 4XL: 1.24m 5XL: 1.28m 6XL: 1.32m Recommend Height/weight: M: 1.65m/50-55KG L: 1.70m/60-65KG XL: 1.75m/70-75KG 2XL: 1.80m/80-85KG 3XL: 1.85m/90-95KG 4XL: 1.90m/100-105KG 5XL: 1.95m/110-115KG 6XL: 2.00m/120-125KG Package size: 300 * 200 * 100mm / 19.7 * 11.8 * 3.9in Package weight: M: 535g / 1.2lb L: 552g / 1.2lb XL: 569g / 1.3lb 2XL: 598g / 1.3lb 3XL: 632g / 1.4lb 4XL: 671g / 1.5lb 5XL: 682g / 1.5lb 6XL: 728g / 1.6lb Note: The product does not include powerbanks. You need to prepare powerbanks. How to Use: Press and hold the power button for three seconds then you can use it, please note that you need to use the powerbanks(not included) when you use it. Cloth Size: We are Asian size, 2-3 sizes smaller than European size. Please choose the correct size according to our size chart and height/weight recommend. EU Size XXS = Asian size M EU Size XS = Asian size L EU Size S = Asian size XL EU Size M = Asian Size 2XL EU Size L = Asian Size 3XL EU Size XL = Asian Size 4XL EU Size XXL=Asian Size 5XL EU Size XXXL=Asian Size 6XL Packing List: 1 * Heating Vest