Putting together a navy double breasted blazer with beige sweatpants is an amazing pick for a casually stylish ensemble. To bring a carefree vibe to your look, introduce low top sneakers to your look. Keep this combination in your head come spring, and we guarantee you'll save a ton of time trying to pick out what to wear on more than one occasion. As you're heading into your 30s, you probably want to start dressing more maturely. If that's the case, combinations like this are ideal as inspiration.