A navy vertical striped wool blazer and a navy crew-neck sweater are the perfect way to introduce an air of manly sophistication into your current off-duty fashion mix. White leather low top sneakers are a fail-safe way to add a sense of stylish effortlessness to this ensemble. When you're having one of those gloomy fall days, sometimes only a knockout ensemble like this one can get you to face the outside world. This ensemble suggests how to keep killing in the casual style department as a 30-something Millennial gentleman.