New Era Perforated Performance Cap. Built for ultimate performance, this cap has SOLARERA 50+ UV protection, MICROERA odor-controlling technology and COOLERA sweat-wicking technology Ventilating perforations give superior breathability and cooling Fabric: 100% polyester Structure: Unstructured Profile: Mid Closure: Hook and loop with clear tab 9FORTY FIT: Features a collegiate look with an adjustable closure, a contoured crown and precurved visor.