The Running Bare Women’s Mesh Up Running Cap is designed to provide exceptional breathability while you’re working up a sweat. The perforated mesh fabric helps promote greater airflow for increased ventilation. An adjustable back strap offers a custom fit for all-day comfort.Fabric: 100% PolyesterPerforated mesh fabric provides maximum breathabilityAdjustable back strap allows you to find your perfect fitReflective logo helps increase visibility in low-light conditions