The 3M Speedglas 9100XXi MP Air Welding & Safety Helmet with the Heavy Duty 3M Adflo Powered Air Purifying Respirator PAPR offers welders up to 12 hours of continuous powered air respiratory protection. With the 9100 MP Air, welders can experience combined eye, head, face, optional hearing and powered air respiratory protection. The Speedglas 9100XXi auto-darkening lens with True-View gives you the largest viewing area on the market with Speedglas peripheral SideWindows. The welding helmet easily flips up to reveal a clear, high impact grinding visor while a built-in safety helmet provides overhead protection. The award-winning Adflo respirator gives welders a Required Minimum Protection Factor of 50.