The Serengeti Bormio sunglasses are built for comfort and style with their fashionable and sleek design offering an ultra-light sporty construction. Fitted with smoke saturn photochromic polarised lenses, these sunglasses are an ideal style to take on all your adventures as the lens will adapt to all the light conditions and activate by the amount of UV radiation and will transform from light to a darker lens gradually, providing high UV protection at all times.