This city casual pairing of a white crew-neck t-shirt and khaki jeans is very easy to throw together in next to no time, helping you look seriously stylish and ready for anything without spending a ton of time digging through your wardrobe. When it comes to shoes, this ensemble is rounded off well with tan low top sneakers. Gentlemen who wonder how to dress stylishly as you go into your 40s, you have your answer.