Proteger Color Me Happy Cycling Jersey is now ready to assist you to reach the peak of your performance. Uses stretchy aero fabric for the arm and sides to follow your every move during competitive rides, while the front and back made of silky polyester. We make sure you can unleash your utmost potential with Proteger MATERIAL amp; CARE Construct with the flatlock seams method to secure the fabric stretch without unwanted bulk. - 88% polyester - 12 % Elastane - Stretchy aero fabric for the arms