BREATHABLE FABRIC - womens summer hat is made of quick-drying polyester, - It’s lightweight and breathable. - Inside the hat is a breathable mesh layer - There an adjustable band at the back to make it fit smaller/larger - There’s a pony tail hole at the back - Brim is approximately 3.25 inches wide, so you get lots of protection from the SUN ! It’s NEW never worn. We purchaded the wrong style and I had accidentally thrown away the packaging, so I couldn’t return it.