This relaxed pairing of a white and red vertical striped dress shirt and light blue skinny jeans is a solid bet when you need to look stylish in a flash. Add white and navy leather low top sneakers to the equation et voila, your getup is complete. Needless to say, it's easier to work through a hot weather day in a light and breezy look like this one. If you want to portray maturity and professionalism as a 20-year-old man, an ensemble like this is a safe bet.