The 3M Speedglas 9100-Air Welding Helmet with Adflo PAPR & ADF is a comprehensive welding protection system that provides the highest level of protection for your eyes, face, and lungs. The helmet features a flip-up auto-darkening lens that instantly darkens to protect your eyes from the intense light of welding arcs. The Adflo PAPR provides fresh, filtered air to help protect your lungs from harmful fumes and gases. The ADF (Automatic Darkening Filter) provides clear vision for non-welding tasks, such as grinding and setup. The 3M Speedglas 9100-Air Welding Helmet with Adflo PAPR & ADF is the perfect choice for professional welders who demand the highest level of protection. It is also a great choice for hobbyists and DIYers who want to protect themselves from the hazards of welding. Here are some of the key features of the 3M Speedglas 9100-Air Welding Helmet with Adflo PAPR & ADF: Flip-up auto-darkening lens with 5-8-9-13 variable shade Adflo PAPR provides fresh, filtered air ADF