Such must-haves as a navy blazer and a white crew-neck t-shirt are an easy way to introduce effortless cool into your day-to-day casual rotation. Complement your look with a pair of navy athletic shoes to instantly amp up the street cred of this getup. Clearly, it's easier to work through a roasting hot summertime afternoon in a light and breezy ensemble like this. This pairing proves that in your forties you still have a wide range of outfit options.