Lightweight and stretchy, the Nike AeroBill Heritage86 Hat is a comfortable complement to any outfit. Plus, it has perforations on the sides and back that increase airflow and help you stay cool on warm or sunny days. Benefits Nike AeroBill technology combines breathability with sweat-wicking comfort to help reduce distractions. Adjustable closure lets you personalize your fit. Elastic at the edge of the webbing stretches to help secure your fit. Sweatband is soft and absorbent.