In reply to Irishpotatos:
Sorry if I seemed to be angry. My rant was not against you. You were clear about what you were asking. I am also against paying over the odds for things unlike many other climbers, it seems. Yes, if you can afford it a perfect pair of trousers may be great in all conditions, but it will cost a lot.
As I said, one really thin pair of cheap trousers does for almost all my climbing- sea cliff, mountain, outcrop, sweaty limestone quarries and indoor wall. The only real natural asset I have is very flexible legs, so I certainly use all the space that trousers will give me. I also wear them walking and to the pub. Getting clever layers for your top half is where your money will be well spent. Or a good next pair of shoes or whatever.
Seriously, for most of the twelve or so years I have been climbing, I have simply worn my most recent pair of trousers that became too scruffy. No pair of trousers looks great with chalk all over them, eh? Recently I have decided that man-made fibres are good because they dry, but that is all.
I hope this helps,
Cake