By combining lightweight, abrasion resistant nylon with conductive thread heating elements, our heated women's vest is your perfect solution for keeping warm on the go. With our New Quick-Charge Multi-Voltage Battery the Dune Heated Women's Vest provides up to 10 hours of electric warmth! A low setting for those brisk days, medium for the cold ones and high for the bone chilling ones! Our ultra compact battery supplies 3x the juice of other competitors and has a USB port for easy mobile charging.