The Oakley Hydra sunglasses are a semi-rimless, shield lens sunglass. Featuring the Oakley B1B logo on the temples, Hydra is accentuated by a modern trigger stem design. A plant-based BiO-Matter frame and three-point fit helps provide balanced fit and comfort while Prizm Lens Technology enhances color and contrast. BiO-Matter is made from bio-materials having at least 56% bio-based carbon content (representing ratio of castor oil to fossil sources).