Airstream HatLightweight, breathable, and built to perform. The Airstream Cap features a streamlined 6 panel design with a stretch fit fullback for a secure, comfortable feel. Made from a recycled polyester blend with stretch, designed with laser cut perforations in the front panels to enhance airflow where you need it most. Finished with a Levelwear branded elastic sweatband, this cap keeps things cool, dry, and comfortable.