Serengeti Navigator Sunglasses Aviator A longtime favorite, the timeless designs in our Aviotor Collection can be worn while navigating serpentine hill country roads or soaring above a scenic coastline. Drivers The Drivers brown-colored lens is ideal for driving, because it adjusts to the changing light conditions that are inevitably encountered on the road. 24% transmittance lightened lens/9% transmittance darkened lens. 24% transmittance lightened lens/9% transmittance darkened lens.