Fisherman Eyewear Farallon Sunglasses-Polarsensor affordable photochromic, polarized fishing glasses, Polarsensors lighten to nearly clear in darkness or indoors and darken to to near shade in bright light Polarsensor lenses are constantly adjusting their tint to maximize eye protection while enhancing fishing vision with a VLT range of 9% -32% in under 10 seconds Gray Lens used that provides great true color transfer, it's the do everything lens VLT=12-32%, Yellow lens great for all light conditions and when heightened contrast is required VLT=10-30%, Brown Lens is adaptable to all fishing conditions early morning nylon frame, curved for complete face fit, durable-flexible to withstand extreme encounters a frame with superior eye coverage, where wind and glare side protection are required.