Tifosi Tyrant photochromic sunglasses feature lenses that automatically adjust their tint 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. 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. Adjustable, hydrophilic rubber nosepieces and temple ends become tackier when wet for reliable grip during exercise and hot weather. Ventilated lenses increase airflow to help eliminate fogging. Fits small to medium faces. Includes a semi-rigid carrying case and cleaning cloth.