I'm wondering what kind of protection, if any, you all use when going on tour to protect against flats. Airless tires, liners, kevlar tubes, slime, etc etc?? I was out training yesterday and ran over a stinkin' piece of glass (for fun, youth in Poland seem to love breaking glass on our streets, ugh!) and got my first puncture for the season. And I'm just wondering if my semi-slicks need a little help to endure such things down the road (literally and figuratively).