I want to put together a smart casual capsule for November and December evening functions. It is summer here.

I read this post http://youlookfab.com/2011/06/.....for-women/ where Angie refers to wearing dressier sandals that can also be flat. I obviously don't quite understand the term "dressier". What exactly would a pair of dressier flat sandals look like? A few photos will be very helpful.

Maybe I also need an explanation of what dressier means in general.

Thank you in advance.