I went through 1350 miles flat free with my 700/25 Gatorskins. They did so well I got cocky and started ignoring the glass in the road that's a regular feature of my commute. For a while I even got away with that. Then last week I got my first, second and third flats with the Gatorskins -- the first from a piece of glass that managed to work its way through the tire and the next two from poor tube installation. Live and learn.