I know this is only a sample size of 1, but I get my Levi's from the outlet store. I got two pairs of 531's about 6 years ago and basically lived in those two pairs. I wasn't sliding around on the ground, but I was doing woodworking so they took a beating and got pretty dirty. I just took a look at them and they only spot that even looked worn was at the top of the seat, right where 4 seams come together. Otherwise nothing. I only replaced them because I dropped 4 inches off my waist and they'll just fall off me now.