Women's Wide Brim Swim Sun Hat. A swim staple, featuring a generous 9cm structured brim which provides the perfect amount of shade to your face, neck, eyes and ears. Our Wide Brim Swim Hat is water-resistant and quick drying, making it perfect for in and out of the water. It features a detachable chin strap, discreet ponytail opening and adjustable size toggle at the back for versatile styling options.