This Как я встретил вашу маму screencap contains
деловой костюм.
There might also be
костюм, костюм одежды, свободная одежда для работы и отдыха, and вялый костюм.
This is an interview with Cobie Smulders who talks about the show. I think it's not spoilery in terms of big stories, but there's еще of what we've already seen about to come up.