The Oakley M2 frame is the newest evolution in the classic M frame family. Fluid contours and sleek lines add velocity to the classic style while interchangeable lenses help to keep you in control of changing light conditions.Oakley Polaric Ellipsoid™ lens shape for full coverage and incredible visibility.UV protection of Plutonite® lens that filters out 100% of UVA / UVB / UVC & harmful blue light up to 400nm.Interchangeable lenses to optimize performance in any environment (spare lenses available from MFR).For medium to large faces.