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: Structured Profile: Mid Closure: Hook and loop with clear rubber tab 9FORTY FIT: Features a collegiate look with an adjustable closure a contoured crown and precurved visor Structured for stability with a classic cap shape.