For a casually cool outfit, consider teaming a navy crew-neck sweater with navy chinos — these items fit wonderfully together. Let your outfit coordination prowess really shine by finishing off your look with a pair of white leather low top sneakers. During the winter season, when warmth is above all, it can be easy to surrender to a less-than-stylish ensemble in the name of functionality. But this ensemble is a shining example that you can actually stay toasty and remain equally stylish in the winter season. Wondering what you should wear as you get into your 30s? This ensemble is a wonderful example.