This heated vest is lightweight, yet insulated, so you can wear them with or without a jacket. Water and wind-resistant exterior ensure you keep warm and comfortable in unpredictable weather conditions. Considerate Design The heated vest mens adopts special new silver mylar thermal lining, which is skin-friendly and soft. It comes with a indicator to show the working status. Lightweight material makes the men’s heated vest a perfect choice for cold days, no more heavy burdens. Excellent Heating System 4 carbon fiber heating elements that generates heat across the core body areas (left & right abdomen, mid-back and collar). And it has 3 heating level for adjusting by pressing the button. (high, medium, low) Heating Element : Left & right abdomen, mid-back and collar Heating Level : high, medium, low LED Color : High: red LED |Medium: white LED | Low: blue LED Temperature Setting : High: 122°F/50°C |Medium: 104°F/40°C | Low: 86°F/30°C Length : Hip-length Fit : Regular Shell : 100% nylon Care : Machine washable SIZE Bust(inch) Hip（inch） Length（inch） S 41.7 40.2 26.8 M 44.9 43.3 26.8 L 48 46.5 27.6 XL 52 50.4 28.3 2XL 55.1 53.5 29.1 3XL 59.1 57.5 29.9 4XL 63 61.4 30.3