A dark brown blazer and a light blue vertical striped dress shirt teamed together are a sartorial dream for those who love casually sleek ensembles. Complement this getup with a pair of black leather loafers to kick things up to the next level. So as you can see, this is a kick-ass choice for summertime. So if you're in search of style inspiration for dressing as you age into your 40s, this pairing is an amazing example.