Hand made in high quality acetate for a premium feel with robust seven-bar hinges & metal logotype. WAS Photochromatic has a photosensitive lens that gets darker with a higher light intensity which makes the glasses extremely versatile. The brown lens tint is optimized for snow sports or other sports where increased contrast & definition is desired. The lenses are made in NXT a lens material that provides superior optical performance & protection. Treated with anti-scratch anti-reflective oleophobic & hydrophobic coatings.