Natural Beauty and Style with Merino Wool One of nature’s finest performance materials, Merino wool delivers superior performance for year-round adventure. Light, breathable, odor resistant, itch-free and easy care, Merino wool sweaters and jackets are the natural choice for your demanding activities. Merino wool is naturally wicking so it transfers moisture away from the body to keep you cool and dry in every season. Unlike synthetic materials, Merino wool is an active fiber that reacts to changes in your body temperature. Small, insulating air pockets allow efficient temperature regulation so you stay warm in cold conditions and cool in hot conditions.