Design meets technology. Introducing Air 4: The first women's addition to the Revo Black collection. These sunglasses are made with the highest-quality titanium and stainless steel, making them both lightweight and durable. The chic and modern design of Air 4 is sure to turn heads wherever you go. It features NASA-based lens technology that provides superior UV protection and reduces glare so you'll be able to enjoy clear, sharp vision even in the brightest sunlight. Pick between Serilium+ or light-adaptive lenses.