The Pro All Weather Jersey uses innovative Polartec® technology to deliver high speed performance in all weather conditions without compromising on weight or breathability. Taking the same advanced engineering used in our fastest Pro Jacket II, thermoregulating properties within the fabric give sustained insulation from the elements while allowing warm air to escape when intensity increases. A waterproof membrane will keep you dry through seasonal showers without adding bulk or sacrificing airflow. Ultra-lightweight fabrics with the right amount of stretch offer increased comfort when tackling the hills. A close, race orientated fit eliminates flapping when riding in an aggressive racing position.