For a tested casual option, you can rely on this pairing of an orange crew-neck t-shirt and white chinos. Get a bit experimental when it comes to footwear and play down your outfit by rocking a pair of high top sneakers. You actually can look cool and fresh under the sweltering heat. The proof is right here When it comes to casual dressing ideas for men in their 20s, this outfit is a good look on almost any guy.