This casual pairing of a navy denim jacket and a black crew-neck t-shirt is a winning option when you need to look great in a flash. Inject this outfit with an air of class by rocking black leather casual boots. While it can be a bit of a challenge to stay on-trend in extra cold, it's outfits like this that prove it's actually possible. More refined outfits like this work well on 20-year-olds.