Oakley M2 XL Prizm Road Sport Sunglasses Introducing Oakley's M2 XL Prizm Road Sunglasses. Clarity of vision is everything when you are out in the sun. Whether it is picking debris or cracks in the road out when traveling at speed on the bike or just admiring the scenery for all of its majesty, the Oakley M2 XL Prizm Road Sunglasses are the elite-level eyewear item you want to be wearing. PRIZM technology offers a high contrast lens that significantly boosts environmental colours and contrasts. This unprecedented tuning of colour in a pair sunglasses lenses enhances visibility on the road, helping you pick every little detail out of the road surface and scenery. This couples with the 100% UV filtering of the Plutonite lenses. The glasses use Oakley's legendary High Definition optics (HDO), which provides market leading optical clarity, visual fidelity and impact resistance. The lens is 100% optically correct at an XYZ optics level. This provides a superb image clarity and depth perception, while also reducing the threat of eye strain over long periods of use. The frame is also built for comfort, performance and longevity. The O Matter frame comes complete with Unobtanium earsocks and nosepads. This material alleviates the threat of slippage or movement even when you are sweating.