cotton, polyester TRENDY SUN HAT: The high quality curved bill design will keep the sun out of your eyes whether you??re sunbathing, lifeguarding, or swimming at the pool. Perfect pool accessory! ONE OF A KIND STYLE: Fully embroidered, high visibility, distressed design that can be paired with any outfit! ONE SIZE FITS MOST: Easily loosen or tighten with the adjustable Velcro strap to ensure a secure fit. COMFORTABLE ALL DAY: Whether you??re using it as a running hat, beach hat, or casual, fashion hat?C the lightweight, breathable mesh back allows for maximum comfort. HIGH QUALITY MATERIALS: High quality materials (80% cotton, 20% polyester) for long term wear.