Not only does it protect your face from UV rays, but it also adds a feature that you will want to use it even more. With a cooling effect that uses vaporization heat and contact cooling sensation, it is not only useful for UV protection but also for preventing heatstroke. Accessory material: 100% polyester; Size: One size fits all; Features: White/UV 90%, UPF 20, Navy/UV 95.3%, UPF 25: For heatstroke prevention.