Material :soft purified cotton fabric ,breathable and comfortable
Size : the free size is best fit from 21.6"-23.7 "（ 55cm-59cm）,and small size circumference less than 21.6",the big brim is 4.7"(12cm) wide enough to provide great protection (20)for your face and neck
Strong anti-uv function: UPF50 sun protection , can block about 50%-80% rays, effectively avoid the skin damage.
Detachable chin strap: can be installed and adjusted as needed for better fit , avoid being blown off by wind
Practical and fashionable :foldable and packable,an essential accessory for your outdoor travel , beach vacation,hiking gardening,fishing or sport