Extremely stylish, this casual pairing of a navy blazer and a grey crew-neck t-shirt will provide you with amazing styling opportunities. To introduce a bit of flair to your ensemble, introduce a pair of dark brown leather derby shoes to this look. You're sure to always look stylish even despite the scorching heat if you keep this getup as your go-to formula. Wondering how to dress age-appropriately as you pass the big 4-0? This pairing is the perfect answer.