The Gerbing Heated Clothing Khione insulated Heated Vest gives you the best warmth and comfort for adventures on and off the bike. Microwire heated coils inside this vest can reach temperatures of up to 135°F to keep your core warm. The Khione vest has a battery life of up to 8hrs to ensure you can ride all day with out worrying about the cold. The nylon outer shell is built to be water resistant and block out the wind while protecting the heating coils from the elements.; Nylon outershell Microwire heating coils Up to 8hr battery life 4 Heat ranges Water resistant Wind proof 200-Fill synthetic insulation Gerbing Heated Clothing lifetime warranty