Gerbing 7V Women's Heated Base Layer The Gerbing 7V Heated Women's Base Layer is a must-have for cold-weather riding. It features three heating zones controlled by an onboard button, providing precise warmth where you need it. With a portable 7-volt battery, it offers up to 8 hours of toasty heat, reaching 135 degrees max. Plus, it's machine washable for hassle-free maintenance. Elevate your cold-weather rides with this innovative base layer. Features: On board temperature control Machine washable 3 heating zones Left chest, right chest and back/collar Microwire heating technology 7 volt powered Heat lasts up to 8 hours Three heat level settings 135 degree maximum temperature Note: 7V lithium battery and charger included