I just wore them day-to-day, going to classes and running errands. No athletic activity whatsoever (you can trust me on that one). Within a year, they started developing holes at the knees. In contrast, the 45rpms have no such problem, and it's been almost two years of similar wear. I just don't understand this. I haven't worn through a pair of jeans at the knee since I was 8 years old and playing on a playground. Old Navy, Levi's, Iron Heart, $20 or $300, I have worn APCs 6 times a week for over 2 years, and there is no hole on the knee, and those are not particularly tough jeans. That makes no sense at all unless you are on your knees all the time.