Let me share with you my opinion on Oakley M Frames. I have the pro m frames and quite honestly - I love them. they are extremely lightweight while the quality of the lenses is nothing short of amazing. Simply put, these are the clearest lenses I have ever had. I also have Arnettes and I like them too, but the clarity of their lenses doesn’t even come close to Oakley’s. when I put the Oakley M Frames on, I don’t feel like i’m looking through a lens. It’s like my whole vision gets immediately improved. Maybe because of the High Definition Technology besides the lens quality.