(Because navy blue is a color that often registers as black were hedging our bets, but, also because its a political convention and not a funeral, we feel pretty confident in our assessment.) The notch collar lapel is clearly visible on his two-button jacket, of which only the top button is buttoned (as is appropriate)
Leave your collar open for an added casual touch with the advantage of providing a little more airflow
I even wore a Karen Millen petite style (seen below, but it's sold out now, sorry) to one of the weddings last year with a slight train (don't worry, it was bright orange, not white!) and I had no trip issues
Wedding cocktail attire is a combination of formal and casual
Large ball gown style dresses are gorgeous in dramatic landscapes, but keep in mind that you will have to hike with all that fabric