Oakley Hydra Sunglasses Inspired by the iconic Razor Blade model, the Oakley Hydra Sunglasses deliver a striking surf-style aesthetic. The semi-rimless design offers a wide field of vision and there are a range of colours and lens options available to suit different environments. The lens is highly impact-resistant and effectively protects the eyes from UV rays. The BiO-Matter® frame is not only lightweight and comfortable for all-day wear, but it's also completely plant-based and a more environmentally-friendly option. An Unobtainium® nosepad helps stabilise the glasses on the face in wet and dry conditions, preventing any slipping.  Includes Hard case Microfibre bag Lens Specification Prizm Black Lens Lens: Prizm Black Light transmission: 11% Light conditions: Bright light Contrast: Increased Base lens colour: Grey Prizm 24K Lens Lens: Prizm 24K Light transmission: 11% Light conditions: Bright light Contrast: Increased Base lens colour: Bronze Prizm Violet Lens Lens: Prizm Violet Light transmission: 13% Light conditions: Bright light Contrast: Increased Base lens colour: Grey Prizm Sapphire Lens Lens: Prizm Sapphire Light transmission: 12% Light conditions: Bright light Contrast: Increased Base lens colour: Grey Prizm Tungsten Lens Lens: Prizm Tungsten Light transmission: 14% Light conditions: Bright light Contrast: Increased Base lens colour: Bronze Prizm Ruby Lens Lens: Prizm Ruby Light transmission: 17% Light conditions: Bright light Contrast: Increased Base lens colour: Bronze