The polarized Dolomite was made to conquer harmful rays of the sun so you can perform at your peak. Polarized Fototec lenses automatically adjust tint according to light conditions, darkening in bright light and lighten when theres less light. Polarized lenses reduce 99 of visible glare from water, snow, sand and pavement for increased visual acuity and decreased eye strain. Lightweight and virtually shatterproof, polycarbonate lenses are 20 times more impact resistant than glass and one-third the weight. Grilamid TR90 lightweight nylon frames offer a consistent fit and flexibility in all temperatures and are extremely impact resistant. Hydrophilic rubber nosepiece and temple ends become tackier when wet for reliable grip during exercise and hot weather. Ventilated lens increase airflow to help eliminate fogging. Fits medium to large faces.