If the situation permits off-duty styling, consider teaming a grey cardigan with charcoal jeans. And if you wish to effortlessly bump up this ensemble with one single piece, introduce a pair of dress boots to the equation. With an ensemble like this in your winter sartorial arsenal, you're guaranteed to stay toasty and look amazing despite the below-freezing temperatures. You can pay attention to combos like this if you're in your early 20s and you want to take a more serious approach to your style.