Empire E-Vent goggles come with a highly advanced and optically correct thermal lens which is dual pane for ultimate anti-fog perfromance, so you can be more accurate in your shooting. The lens is an extremely safe, quick release system. It can be replaced in seconds, but yet is held very securely into the mask and frame. Unlike other quick release systems the E-Vents lens fits in under the nose piece, which prevents the ingress of paint into the goggle under the lens.The Empire E-Vents mask also comes with a lens bag for protection which is ideal for cleaning the lenses. The goggles also come with a goggle bag.