3M is fundamentally a science-based company. We produce thousands of imaginative products and we're a leader in scores of markets - from health care and highway safety to office products and abrasives and adhesives. Our success begins with our ability to apply our technologies - often in combination - to an endless array of real-world customer needs. Of course all of this is made possible by the people of 3M and their singular commitment to make life easier and better for people around the world.Ideally suited for work settings that involve heat, humidity, or long periods of wear . 3M? Cool Flow? Exhalation Valve is a patented one-way valve offering easy exhalation for cool, dry comfort .Adjustable noseclip provides a custom fit, secure seal, and reduces the potential for eyewear fogging .Braided straps provide comfort and durability