A white tank and blue jeans are a bold casual combination that every modern man should have in his closet. And if you wish to easily up the style ante of your outfit with a pair of shoes, complement this look with navy canvas slip-on sneakers. Stick with this one if you're scouting for a standout summery look. Those who are curious whether you can still rock cool off-duty dressing as you age into your 40s, you have your answer.