This welding helmet is designed to protect your face and eyes from sparks, heat, and debris while welding. It features a clear, adjustable visor that allows you to see clearly while welding, and a comfortable, adjustable headband for a secure fit. The helmet is made of durable materials and
From Wikipedia
A welding helmet is a piece of personal protective equipment used by welders to protect the user from concentrated light and flying particles. Different welding processes need stronger lens shades with auto-darkening filters, while goggles suffice for others. OSHA and ANSI regulate this technology, defining shades based on the transmittance of light.