Opt for a grey short sleeve shirt and white chinos to achieve an everyday ensemble that's full of charisma and personality. A pair of black canvas desert boots is a great pick to complete your outfit. Keep this outfit in your front hall wardrobe when spring comes, and we promise you'll save a ton of time brainstorming for a look on more than one morning. When it comes to casual outfit ideas for 20-something gents, this ensemble is ideal.