The Patagonia Women's Nine Trails Bike Jersey combines high-performance fabric with a mountain bikespecific design. Through variable weather and changing altitudes, the ultrasoft polyester wicks away perspiration, and the three-quarter-length sleeves shield the elbows while promoting airflow. Articulated, flatlock seams reduce chafing and the longer back hem conforms to your body position. A small, hidden zippered pocket at the right hip protects valuables (accessible while wearing a hydration pack). This highly breathable, mountain biking top is perfect for longer rides all-year round.