For a look that's truly gasp-worthy, try pairing a trenchcoat with white dress pants. A pair of grey low top sneakers introduces just the right amount of visual interest to this outfit. Take inspiration from combinations like this if it's time to add seriousness to your 20-year-old's wardrobe.
This casual combination of a trenchcoat and navy skinny jeans can only be described as devastatingly stylish. If you need to immediately dial down this outfit with a pair of shoes, complete your look with grey low top sneakers. So pay attention and be the best dressed gentleman your age.