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. These helmets are designed with a darkened lens that automatically adjusts to the brightness of the welding arc, providing clear visibility while protecting against ultraviolet and infrared radiation. Most welding helmets are made from durable materials to withstand high temperatures and impacts. They often come with adjustable headbands for comfort and can include features like built-in ventilation and flip-up lenses for convenience. Proper use of a welding helmet is essential for safety in the workplace.