Irrefutable proof that a red long sleeve t-shirt and black sweatpants look awesome when worn together in a city casual getup. In the shoe department, go for something on the dressier end of the spectrum by sporting a pair of black suede low top sneakers. Come summertime you want to feel comfy and dapper –– this look is just what you need. Wondering how to nail casual looks as you move into your 30s? This combination is the perfect answer.