100% Cotton.Buckle closure.Black baseball cap is made of soft cotton material,exceptional quality,lightweight, make baseball hat more fits for head, lightweight, breathable and comfortable.Blank black hat is simple and elegant design.The structured design of the 2 front panels,Inside the hat do lining coating process, make the shape more solid,the perfect combination of durability and comfort.Plain Baseball cap with buckle design, is easy to adjust to your head size, cozy deep enough fitting covering all heads just right,dad hat,one size fits most-adults (adjuestable: 20~24in).Baseball hat designed has protection from sunshine and wind, practicability and aesthetics.inside the hat made cotton sweat bands, air holes at the top, which can effectively absorb sweat and breathable.Various colors to choose from,high-quality materials and production.whether daily wear, sports or outdoor travel, just to better meet your needs.It's also great gift for friends and family.