The Wiley X Rout LA adjusts and protects you from what ever Mother Nature tosses your way. LA Light adjusting smoke grey lenses darken as the brightness of the sun dictates and maximize optical clarity. Light transmission: 85% to 17% (in sunlight). Filter 8 Polarized, Wiley X"s proprietary polarized lens technology adds 99.9% polarization to 100% ultra violet protection for unequaled clarity and contrast. Wiley X patented. Removable Facial Cavity seal blocks out wind, debris and peripheral light while amplifying polarization and reducing eye fatigue. .