I recently bought some Ralph Lauren Purple Label khaki pants. I was just about to put a pair in the wash and noticed that the care label said dry-clean only. They are 100% cotton and my intention is to use them casually i.e. I don't mind if they get a little beat up. Do you think it is ok to put them in the wash despite the care label? I can understand why one would want to dry-clean a delicate cotton shirt, but am not sure why this would be so for regular weight khakis.