Opt for a navy quilted shirt jacket and a blue denim shirt for a relaxed and fashionable ensemble. For a more laid-back vibe, complete your outfit with a pair of beige leather low top sneakers. There's no nicer way to cheer up a dull fall day than a knockout outfit like this one. Gents who wonder how to pull off cool casual outfits as you go through your 20s, this combo should answer your question.