SHELL : 95% POLYESTER 5% ELASTANE, LINING : 100% POLYESTER, LOWER SHELL OUTER SURFACE : 100% POLYESTER Imported Silicone Cobra Patch Adjustable Snapback closure for the perfect fit Mesh paneling for the ultimate feel and breathability Premium Materials- New technical performance material that is lightweight and moisture wicking One Size Fits All - The classic snapback closure allows you to adjust to your desired size