For an off-duty outfit, marry a denim shirt with a navy long sleeve shirt — these pieces play really well together. Clueless about how to complement this look? Rock brown leather derby shoes to up the classy factor. So if it's a blazing hot warm weather day and you want to look on-trend without putting too much effort, this outfit will do the job in next to no time. So take notes and be the best dressed gent in the room.