One of the coolest ways for a man to style out a long sleeve shirt is to pair it with white chinos for a laid-back getup. And if you wish to effortlessly dial down your outfit with a pair of shoes, complement this outfit with red and white low top sneakers. Come baking hot sunny days you want to feel comfy and sharp –– this outfit is just the one you need. All in all, a great demonstration of casual style for 20-year-old men.