The Under Armour Iso-chill Armourvent STR cap offers superior comfort and performance. It features ArmourVentâ„¢ Technology for ultimate breathability, a light, stretchy, durable, and fast-drying fabric. The Iso-Chill sweatband helps disperse body heat, making it feel cool to the touch. Its stretch construction provides a comfortable fit, and the UA Classic Fit ensures a pre-curved visor and structured front panels that maintain shape with a low profile. This cap is made of 100% Polyester and is imported.