Warmawear Battery Heated Waistcoat Jacket with Collar Four pockets (two internal, two external) ideal for Dual Fuel disposable heat pads for maximum warmth on the go Lining and exterior made from 100% hollow fiber polyester - efficiently insulates and helps retain heat Two lower back heating elements - protect most vulnerable area when working outside Protected front zip and drawstring hem - reduce heat loss through front of waistcoat Simple to use battery packs included - just plug in the USB and switch on