3M™ Speedglas™ Welding Helmet 9100XXi Air Adflo PAPR (Each)Product Features Largest Welding Helmet Viewing Area Available: The huge Speedglas 9100XXi auto lens combined with the Speedglas peripheral SideWindows gives you the largest welding mask viewing area available on the market. 3M Speedglas SideWindows Previously hidden peripheral hazards (beams, obstacles and other workers) are now visible through two, shade 5 side lenses (conventional shade 13 protection). Highest Optical Rating Speedglas welding