Run fast and let your hair free. This sweat-wicking hat has a wide back opening that fits your ponytail and gives you airflow. swift Swift fabric is lightweight, four-way stretch, sweat-wicking, and quick-drying features Designed for: Run Goodbye sweaty forehead: Interior Mesh fabric sweatband wicks moisture Shine-bright : Reflective detail helps keep you on the radar in low light Stretch closure: Stretch elastic closure Recycled polyester: Feel the love—100% of the polyester in this product (excluding trims) is recycled