A navy parka and a black crew-neck t-shirt are a great combination to have in your off-duty wardrobe. Go ahead and opt for a pair of red low top sneakers for an added dose of class. When it's one of those dull autumn days, what better to spice it up than a dapper outfit like this one? Gentlemen who are curious how to wear cool off-duty outfits as you move into your 30s, this getup should answer your question.