You can’t go wrong with a classic men’s cable cardigan made from all-natural yarns. From smart slim fits and versatile v necks to chunky button ups, wool is a winner. Unlike synthetic acrylic or polyester, wool is naturally breathable, making it a supremely comfortable layer. Even better, it will keep you warm when it’s cold and cool when it’s warm. Try a lighter men’s cotton zip through cardigan in the warmer months, it’s the perfect layer to pack away until you need it. During winter, nothing beats a fairisle cardigan.