MUTEKI Men's S.P.E.E.D. Short Sleeve, Full Zipper Cycling Jersey 100% Polyester Comfort/semi-form fit. Flat-lock seams give extra comfort. Soft, comfortable, breathable, wicking material with enhanced airflow. High-visibility reflective designs and logos for safety in style Rubber grip in the back keeps the jersey from riding up, while maintaining comfort in the front. S.P.E.E.D., Speed Performance & Endurance Enhancing Design.