Material and Functionality: Made from high-performance polyester, it is lightweight, breathable, and moisture-wicking. It is suitable for high-load activities such as mountain training, and its DWR (Durable Water Repellent) treatment repels light rain. Design: Polydel™ mesh is used in the side panels for enhanced breathability, and SpacerMesh™ is used in the inner headband to control moisture. The brim has foam inserts to prevent deformation. Fit: The TPU strap and low-profile buckle allow for a wide range of size adjustments and a secure fit.