The Voltera Heated IV women's walking jacket from Regatta is just the thing for adventures out in the cold. The women's jacket is made from waterproof and breathable Isotex 10000 fabric that'll see off rain and keep you feeling fresh. When the temperature drops, the Thermoguard insulation and Heated Technology will keep you toasty. Please be aware the battery is not included with the jacket and will need to be purchased separately. Any 5 Volt battery pack with a minimum output of 2.1 Amps can be used with our heated jackets. Our battery pack specifications are: Capacity: 5000 mAh Input: Micro-USB: 5V DC 1A Output: USB-A x 2: 5V DC 2.1A Regatta Women's 'Voltera VI' Isotex Heated Hiking Jacket in Grey Size: 14