Putting together a navy crew-neck sweater with jeans is a great idea for a relaxed casual outfit. Black leather casual boots are a fail-safe way to bring an air of polish to your look. With a look like this in your winter sartorial collection, you'll manage to stay cozy and look stylish despite the below-freezing temps. You can take inspiration from combos like this if you're navigating your late 20s and you want to take a more mature approach to your style.