In reply to HosteDenis:
I've used climbing jeans for a while now - essentially because all the 'normal' jeans I bought got ripped cycling / running for the train / drunkenly buildering. So far the plan's worked - one pair's lasted me a few years longer than any other jeans, plus they've survived various knee bars / leg jams unscathed.
As such I recommend the Prana Axioms. Though if you want skinny there's an equivalent - the Theorem I believe (linked above).