Oakleys HSTN Metal showcases the original frames progressive design and heritage features of the first generation of HSTN while being in a league of its own. The original frame came to life after Oakleys team of designers worked closely with friends of the brand in search of the next fresh take on lifestyle eyewear. The resulting sunglass with striking modernized circular lenses has now been evolved a step further with a wire trigger design. HSTN Metal also features Unobtainium nosepads for the first time, providing unparalleled comfort and improved grip, while the BiO-Matter frame material gives the frame all-day durability. BiO-Matter is made from bio-materials having at least 56% bio-based carbon content (representing ratio of castor oil to fossil sources) Fresh take on a classic shape in a progressive design Lightweight and durable BiO-Matter frame provides all-day comfort Unobtainium nosepads provide no-slip grip