The 3M Speedglas 9100FX Adflo XX Helmet is the most advanced welding helmet on the market. It offers superior protection for your eyes, face, and lungs, and it features a number of innovative technologies that make it more comfortable and easier to use than ever before. Features: Variable dark shade 5, 8, 9-13 for most types of arc welding Natural Color Technology for a lighter, more detailed, and more colorful view Auto-on/off with adjustable sensitivity and delay Large viewing area (73 mm x 107 mm) Flip-up design for easy grinding and inspection Integrated Adflo Powered Air Respirator for clean, fresh air Lightweight and comfortable design Benefits: Protects your eyes, face, and lungs from harmful UV rays, arc flash, and sparks Provides a clear, undistorted view of your work Reduces eye strain and fatigue Improves productivity and safety Specifications: Nominal Protection Factor (NPF) : 500 (TH3) Lens: 3M Speedglas 9100XXi Respirator: 3M Adflo Powered Air Respirator Weight: 1.4