Serengeti MartinoDark Tortoise / Polarised Drivers LensesSerengeti Martino's retro shape is eternally cool. It suits most face shapes too. And Serengeti has kept the branding simple.Martino is forged from grilamid TR90. So they're built to last but they're lightweight for the greatest comfort. Spring hinges add durability.Here Serengeti's patented Spectral Control fine tunes light transmission. Now colours are vibrant and the view is sharp. Spectral Control also helps block most blue light (this type of light usually damages eyes and causes eye fatigue).Serengeti lenses are photochromic too. So they lighten and darken with the conditions (even inside the car where UV is minimal). Polarisation beats blinding glare – so there's no need to squint and eyes can relax.This one features Serengeti's famous Drivers Lens. Designed especially for the road, it makes colours from objects even more vibrant. And it's adapted for all driving conditions. Plus contrast is amped up.Anti-reflective lens coating prevents light bouncing back into your eye. UV400 lenses. Serengeti sunglasses come with a one year manufacturer's warranty.