Be warm within minutes with Woof Wear’s battery-operated Heated Gilet, warming the lower back, tummy and chest for core-body warmth. Simply plug in a portable battery to the USB cable in the pocket, press and hold the button for three seconds to begin heating and use the button to switch between three heat settings: high, medium and low. Even without the battery, the Heated Gilet features a cosy lining, perfect for layering in the winter