In sartorial situations comfort is a must, this pairing of a white crew-neck t-shirt and navy chinos is a winner. Want to break out of the mold? Then why not add a pair of light blue canvas high top sneakers to your ensemble? Come boiling hot summer days you're looking for an outfit to keep you comfortable and stylish –– this ensemble is just what you need. When it comes to casual outfit ideas for 20-year-old gents, this ensemble is perfect.