I will second Patagonia. It's a hard purchase up front, but their products last a lifetime, and if they don't they will repair or replace them. They make really sturdy jeans, and pants, and their basic organic shirts are super soft. I actually find plenty of good used Patagonia on Ebay, and I think the older it is, the better the quality! I am a huge fan of Ibex clothing too, but they just went out of business :( there are a lot of good outdoor brands to be found at Sierra Trading Post too, and usually at good prices! In general, I buy all of my clothing at outdoor retailers/gear shops...even my casual clothing, because they are meant to be worn hard, vs casual clothing stores seem to make disposable clothing