A well pulled together casual combo of a white vertical striped long sleeve shirt and navy jeans will set you apart in an instant. Our favorite of a myriad of ways to complement this look is a pair of white canvas low top sneakers. So as you can see, it's super easy to look sharp and stay warm when colder weather comes, thanks to this outfit. Those wondering how to sport cool off-duty dressing in your thirties, you have your answer.