A grey sweatshirt and a navy and green plaid long sleeve shirt are absolute menswear must-haves if you're crafting a casual closet that matches up to the highest style standards. Make your outfit more practical by rounding off with a pair of olive snow boots. During winter, when warmth is top priority, it can be easy to settle for a less-than-stylish ensemble in the name of convenience. But this ensemble is a bright example that you can actually stay comfortable and remain stylish during winter.