Material of the mesh flat cap for summer: polyester and cotton. Breathable mesh hat size: One size fits most with adjustable straps on both sides. Head Circumference: 22??-24??, Height: 4.7. This light weight mesh cabbie summer hat will keep your head cool during hot weather, while providing vents and blocking the sun. Stylish newsboy beret hat for any outdoors like running, driving, hunting, hiking, etc. Breathable mesh design makes it very comfortable for daily wear. BABEYOND IS A REGISTERED TRADEMARK IN US PATENT AND TRADEMARK OFFICE (Serial Number 86492044).