3M™ Pressure Diffusion Temple Technology means there are no moving parts and nothing to adjust, while the versatile design is suited for a wide variety of faces. Scotchgard™ Anti-fog Coating lasts longer than traditional anti-fog coatings, helping to increase eyewear performance in wet and steamy environments. Rugged Anti-Scratch (RAS) coating helps extend the life of the lens. Polycarbonate lens absorbs 99.9% UV. Photochromic lens darkens when exposed to UV light outdoors, and lightens wiht removed from UV exposure indoors. Meets ANSI Z87.1+ High Impact standard. Certified to the requirements of the CSA Z94.3 standard.