【Waterproof & Quick-Drying Fabric】: This women's sun hat is made of hydrophobic polyester to ensure all-day quick-drying comfort when you're out and about. 【Breathable Mesh】: The hat comes with breathable mesh on both sides to promote airflow exchange and keep your head cool. 【Adjustable Snap Closure】: The flexible snap closure allows you to change the contour of the hat so you can easily transform your look. 【Ponytail Hole】: The ponytail opening increases your hair styling options and provides a comfortable fit. 【Foldable】: This hat is lightweight and foldable, so it can be easily stored in your backpack without getting out of shape.