Welding apparel includes welding glasses, welding goggles and welding helmets. Welding helmets fit over shrouds to protect the welder's face and eyes. They have filtered lenses that prevent retina damage from UV and infrared light. Lenses can be passive, which means they have a fixed filter shade, or they can be auto-darkening. Auto-darkening lenses adjust to the amount of UV and infrared light present.