A grey cowl-neck sweater and navy ripped skinny jeans are indispensable casual pieces, without which no casual wardrobe would be complete. Get a little creative on the shoe front and add black leather ankle boots to the equation. During winter, when warmth is paramount, it can be easy to settle for a less-than-stylish look in the name of functionality. This look, however, is hard proof that you can actually stay comfy and remain absolutely stylish during winter.