Whether youre working the runways or working 9 to 5, step outside and relax in the sun while the polarized lenses of the SunCloud Runway sunglasses provide relief to your eyes Polarized lenses reduce 99 of visible glare from water, snow, sand and pavement for increased visual acuity and decreased eye strain. Polycarbonate lenses are 20 times more impact resistant than glass and a third the weight theyre also acid- and heat-resistant. Grilamid lightweight nylon frames offer a consistent fit and flexibility at any temperature, and they are extremely impact resistant. Black frames feature polarized gray lenses to eliminate glare and produce the truest transmission of natural colors. Tortoise frames feature polarized brown lenses to eliminate glare and enhance contrast while maintaining accuracy of color transmissions. White-pink frames feature polarized gray lenses to eliminate glare and produce the truest transmission of natural colors. Medium fit.