A welding helmet is a protective gear worn by welders to shield their eyes and face from harmful light, heat, and sparks produced during welding processes. It typically features a darkened lens that automatically adjusts to the brightness of the welding arc, providing clear visibility while ensuring safety. These helmets are designed to be comfortable and lightweight, often equipped with adjustable headbands for a secure fit. Many modern welding helmets also include additional features like auto-darkening filters and respirators to enhance protection and comfort during extended use.