Provides a wide field of view. Paint and stain-resistant lens 3M's exclusive Scotchgard™coating causes some liquids to bead up on the surface so they can be wiped off easily. Bonded silicone gaskets eliminates loose gaskets that can be lost. Easy to use respirator attachments twist on and off easily for quick assembly and disassembly. Low profile bayonet design. Soft silicone nose cup and faceseal. Patented 3M™Cool Flow™exhalation valve