It's a Hex with flex: Enjoy the look and feel of our new Flexfit flat-brimmed, fitted ball cap. Our original Hex Turtle design on the front is a sure hit with the neon green Turtle going its own way, just like you. With contrasting colors of black and white, this polyester/cotton blend hat is both lightweight and stylish. The inside also has a poly/spandex woven Flexfit sweatband for extra comfort. The mesh back lets the air move through to keep you cool.