There folding Kevlar puncture resistant tires. If you put them on a scale you find they weigh considerably more than "standard" 27 X 1 1/4 tires. If you're trying to keep the weight down on your bike don’t buy them. If you want tires, which resist flats and don’t mind the added weight these are the tires you want. As for price, try purchasing any foldable tire for what Wal-mart sells these for.