I couldn't even touch my lenses with the bag. The only thing that touches my lenses are clean bare fingers, dish soap and hot water , and rinse well followed by light dab with a new Kleenex. I saw a guy on his bike the other day. He stopped, got off of his bike, removed his Jawnbones, took the bag out of his back pocket and really rubbed hard on the lenses with the dirty, dusty bag. I was talking to him. He put his Black Itidium Prisms back on (I heard Prisms were big with bike racers, and he confirmed it" and I could see circular swirls all over his lenses. I just wondered if any "in the know" Oakley people actually relied on the dirty bag to maintain Your Oakleys? It just goes against everything that I ever learned about keeping those great lenses like new for a long time. The scratch is inevitable, but using that bag guarantees that Your first scratch will be within the first few days of wearing Your new Oakleys. Watching that biker freaked me out when I saw him laying into his lenses with Oakley Sandpaper. You don't, do You?