I've found that I can extend the life of the jeans by a little while if I buy jeans that are raw and of a higher denim weight (usually Swedish and Japanese) but still them seem to go from new to hole in the less than 18 months. G-star RAW can be OK, because they often have double-layered material in that region. Maybe their duty cycle is too high, I only have 6 pairs (2 grey, 2 light blue and a 2 dark blue), maybe they get worn too much? Any suggestions? EDIT: I also found that if I freeze them to clean them, instead of washing them, not only do I save water, but the material tends to last longer. I usually just leave them in the -20C or -80C freezers at work.