UA Storm technology repels water without compromising breathability. Durable fabric on the body combines with soft, stretchy knit on the bottom hem and cuffs for mobility and comfort. Strategic 80g synthetic insulation on the front of the body for light warmth without excess bulk. Breathable mesh panels under the arms for better ventilation where you need it. Secure zippered hand pockets with an internal media pocket. Reflective details for better visibility when running in low light.