Named for the natural arch that formed when flowing lava collided with the cold waters of the Pacific Ocean, Pokowai Arch was developed as a collision of both form and function. Its traditional rectangular shape is pleasing to the eye, and the lightweight material components of a grilamid frame and MauiPure® lenses make this a fitting choice for active lifestyles.( Size: Medium Option1: BLACK Option2: Neutral Grey Option3: Maui Pure®)