Runners know that generating heat is the easy part, even in cold weather. Holding on to your body's warmth is what helps you stay strong and fluid when the temperature dips low. Built with climaheat™ insulation and adidas Primeknit Wool, this men's jacket traps heat close to the body for temperature management from warm-up to cool-down. Thumbholes and adaptive elastic around the neck keep the cold out. Tubular construction reduces chafing and offers smooth, wraparound comfort.