The XL lens shape is the latest evolution of the Oakley M2 Shield sunglasses, and it takes performance even further with an enhanced vertical dimension. Even when your head is subtly tilted downward, things that matter will still be in your field of view when wearing the Oakley M2 XL sunglasses making them a great choice for activities like cycling. The slightly taller design also enhances performance in sports and activities where things above need careful attention. Each pair of M2 XL sunglasses sport Oakley's famous Plutonite lenses that block 100% of all UVA, UVB, UVC and harmful blue light up to 400mm as well as a three-point fit system designed for comfort and everyday wear.Prizm is a revolution in lens optics built on decades of color science research. Prizm lenses provide unprecedented control of light transmission resulting in colors precisely tuned to maximize contrast and enhance visibility.Light Transmission: 20%Light Conditions: Medium LightContrast: IncreasedBase Lens Color: RoseLightweight O Matter frame material with ellipse metal icon accentsUnobtainium earsocks and nosepads increase grip with perspirationOakley performance shield lens technology with HDOInterchangeable lenses to optimize performance in any environment