Wear a blue crew-neck t-shirt and jeans for a no-nonsense outfit that's also put together. To add a bit of flair to this getup, introduce a pair of dark brown suede tassel loafers to the mix. Come super hot sunny days you're looking for an ensemble to keep you comfortable and sharp –– this outfit is just the right one. This combination is your answer to the question of how to dress in your 40s.