LeMieux Young Rider Mia Mesh Base Layer SS26A UV50+ quarter zip base layer for active young riders. Designed to keep them cool and comfortable, this base layer has ventilating mesh panels coupled with sweat wicking thermal fabric for optimal temperature control. The unique sweat wicking technical fabric is designed to regulate body temperature and ensure optimum comfort. Silky smooth, the material offers a stylish tailored fit and the mesh inserts increase airflow and ensure breathability.