Oakley Hydra Crystal Black W/ Prizm Violet Sunglasses Oakley® taps into its surfing heritage with Hydra, a Razor Blades-inspired, semi-rimless sunglass with a shield lens. Featuring the Oakley B1B logo on the temples, Hydra is accentuated by a modern trigger stem design, reminiscent of Razor Blades' origins in surf culture. A plant-based BiO-Matter™ frame and three-point fit helps provide balanced fit and comfort while Prizm™ Lens Technology enhances color and contrast. • DESIGN - Razor Blade inspired, semi-rimless cylindrical lens shape• FRAME MATERIAL - Lightweight, durable BiO-Matter® frame with tuned flex for balanced fit, comfort, and head retention. BiO-Matter is made from bio-materials having at least 56% bio-based carbon content (representing ratio of castor oil to fossil sources)• ALL DAY COMFORT - 3 point fit with Razor blade inspired stem design• SEE MORE DETAILS - Available with Prizm™ lenses that are designed to enhance color, contrast and detail to make the most of any activity