A dark green short sleeve shirt and a white crew-neck t-shirt are stylish menswear pieces, without which our menswear collections would feel incomplete. Our favorite of a ton of ways to complement this outfit is a pair of white canvas low top sneakers. So when summer is done and fall is taking its place, you may find this ensemble your favorite. This combo suggests how to keep succeeding in the casual style department as a 40-year-old guy.