From sunup to sundown the Ventoux sunglasses have at tint for you so you can keep performing without interruption. Fototec lenses automatically adjust tint according to light conditions lenses darken in bright light and lighten when theres less light. Only silver frames include the Fototec lenses. Gloss gunmetal frames includes 3 sets of lenses allowing you to interchangeable the lenses depending on the light conditions. Only gloss gunmetal frames include 3 sets of lenses. Lenses are ideal for low- and medium- light to night time conditions. 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. Fits medium to large faces. Includes a protective case and cleaning cloth.