Your shoulders, chest, and outer arms take the biggest hit when Winter winds start whipping. Luckily, our Men's Muroc Jacket practices zone defense. The upper half is a dual layer of durable, wind-resistant fabric. The lower half, plush 200-weight fleece to trap and circulate body heat. The result? A jacket that keeps you warm and wicks away sweat to keep you dry. So you get protection and warmth without the bulk. It's how UA does a lightweight, heavy-duty winter jacket.