The Shefford Heat Panel Vest delivers lightweight, water-repellent warmth with a shot of exciting technology. The chest and back of this stylish vest have interior heat panels powered by a powerbank with temperature controlled at the touch of a button. The three temperature settings are: Blue = Low (100°F), White = Medium (113°F) and Red = High (131°F). The women’s version of the Shefford Heat Panel Vest has shaped seams and a tapered waist for a flattering fit. A powerbank with a minimum of 5000 mAh is required to heat the vest. Powerbank sold separately. Key Features Material: OUTERWEAR: 100% Nylon dull cire 380T woven, water repellent (600mm) and downproof, 38 g/m² (1.1 oz/yd²). CONTRAST: 100% Polyester knit with DWR finish. INSULATION: 100% Polyester faux down fill, 152 g (5.4 oz) Women’s sz M. Full-zip Zippered pockets Water-repellent Interior heat panels on chest and back of vest control temperature with the touch of a button Heat panels require a powerbank with a minimum of 5000 mAh to operate Powerbank sold separately