Want to infuse your wardrobe with some effortless dapperness? Wear a grey vertical striped long sleeve shirt with a white crew-neck t-shirt. We're loving how cohesive this outfit looks when finished off with white leather low top sneakers. You totally can look cool and fresh under the summer heat. The proof is right here And if we're talking casual fashion tips for gentlemen in their 20s, this combo is a good look on most.