Hmmm. It depends. Sometimes to be true to the character you just have to roll with it. Heroine is an archetype - a slave to fashion (she gets over it... right before the world ends), always striving for an unachievable ideal. So I don't have the details in mind just yet, just the cliche. Hero acts the part of an scoundrel (but only because he's been hurt in the past) and I have a hollywood actor in mind for description purposes.
(Mrs. Howell impersonation) What does one wear for the end of the world?