Feel as free as your feet wearing our ultra-lightweight Barefoot running hat, made from soft, quick-drying, water resistant fabric with UPF 50 sun protection. Mesh wicking insets add comfort at the crown, with perforated panels at the side for extra airflow. Reflectivity on the brim and in back for 360ïº keeps you seen in low light. Merrell Opti-Wick moves moisture away from your skin and accelerates the evaporation process. 100% polyester. Perforated panels add extra side ventilation. Breathable mesh panels at crown increase airflow and wick moisture. Interior sweatband prevents sweat from getting in eyes.