A navy blazer and black chinos are the kind of a fail-safe getup that you so awfully need when you have zero time to spare. Round off with a pair of black and white low top sneakers to upgrade this look. Undoubtedly, it's easier to work through a hot afternoon in a summery ensemble like this. So if you need style ideas on what to wear as you slip into your 40s, this ensemble is a perfect example.