Fit & Design: Athletic fit hat Low-depth design is ideal for runs, lifts and exercise classes Elastic drawcord with toggle is easily adjustable for the right fit 4-way stretch woven panels provide an easy and comfortable fit Reflective elements enhance visibility in low-light conditions Technology: Nike(R) Dri-FIT ADV technology combines moisture-wicking fabric with advanced engineering and features to help you stay dry and comfortable Nike(R) AeroBill technology combines breathability with sweat-wicking comfort to help reduce distractions Nike(R) AeroAdapt technology uses targeted panels of sweat-activated vents to help keep you at the optimal temperature Additional Details: Not intended for use as Personal Protective Equipment (PPE) Hand wash