A navy horizontal striped long sleeve shirt and navy jeans are the kind of a winning casual combo that you need when you have no extra time to spare. A pair of dark brown suede casual boots will contrast beautifully against the rest of the look. It's plain to see how this ensemble will keep you cozy and stylish all season long. As you go into your 30s, you want to start dressing like a grown-up. In this case, inspiration like this proves very useful.