The Oakley Line Miner M has a medium frame size that provides the ultimate in peripheral vision. Full ventilation and an anti-fog coating to keep lenses clear, and Oakley's Prizm lens technology for increased contrast and definition. The low-profile frame and cylindrical lens keeps the Line Miner to sitting closer to your face, giving you a greater field of view. Designed to integrate seamlessly with many helmet shapes. We find that pairing the Oakley Line Miner M with a Medium/Large helmet provides the best fit & comfort. Oakley goggles have a unique face foam shape in the nose area to provide a gap-free-fit for both high and low nose bridges. This added foam eliminates the need for Asian-fit models. Oakley Prizm lenses keep things simple, allowing you to use one lens across a broader range of conditions. Why change lens, when you don't have to? Features Prizm Lenses Medium Fit OTG Compatible Triple Layer Face Foam 100% UV Protection Oakley Line Miner M Ski Goggles