The difference between these Signature jeans and other Levi's (or other traditional jeans) is the 1% of elastic material that allows the fabric to give slightly.  It's a small enough proportion that it's not at all noticeable to the eye, but it feels a little different.  Since I happen to prefer my jeans to fit loosely, I really don't need that give, but if you like yours to fit more snugly, it adds a little comfort.  Otherwise, the jeans fit well and the workmanship is good, especially at this price point.