Consider wearing a harrington jacket and a cable sweater for a comfy outfit that's also put together. For something more on the casually cool side to finish this look, add white leather low top sneakers to the equation. Keep this getup ready to go when warmer days are here, and we promise you'll save time brainstorming for a look on more than one morning. All in all, a perfect example of relaxed casual fashion for 20-year-old gentlemen.