Such pieces as a navy blazer and black chinos are the perfect way to introduce extra class into your current off-duty fashion mix. For an on-trend on and off-duty mix, complete your outfit with a pair of black suede loafers. When leaves change color and autumn is in the air, you'll love this look as your go-to for summer-to-fall weather. This combo is a clear example 40-year-old men can very well slay in the fashion department.