Flexfit Men's Two-Tone Stretch Mesh Fitted Cap 55% Polyester / 43% Cotton / 2% Spandex. Patented, Stretchable, Polyester Mesh Spandex on the Back and Sides Keep you Cool and Comfortable on the Road. The One-Size-Fits-Most Comfort-Fit Design Hugs Your Head and the Stitched, Rounded Visor Features a Silver Undervisor to Keep the Sun Out of Your Eyes. Signature Synthetic Fibers are used in Flexfits Permacurve PE Visor, which Helps the Hat Maintain its On-The-Field Contours. A Solid Buckram Lining and Reinforced Stitching add Durability, Keeping this Trucker Hat Looking as if it's Never Been Worn. A 3 1/8" Crown (Low-Profile Cap), With 6 Eyelets To Provide a Little Breathing Room, Sits Further Up on Your Head For a Less Fitted Look. Sizes: One-Size-Fits-Most. Also available with THP No Sweat Headliner to help reduce dripping sweat and sweat stains.