100% Cotton Fabric; 20% Cotton/ 80% Polyester Lining. Please purchase from Hindawi Inc to make sure the quality, others must be counterfeit. It is original product, 100% Satisfaction, Money Back Guarantee! CHIN STRAP: The detachable neck cord will keep hat stay safe on head in wind. It also comes with a decorative button-bow that can be pinned to the hat. WIDE BRIM: This sun hat has a wide brim which is 4 all the way around, the perfect length to shade your face and the back of your neck. UPF 50+: This beach hat passed UPF 50+ test.100% cotton fabric features skin-friendly,comfort,breathable. FOLDABLE: This summer hat is packable and crushable, will still maintain its shape & can be easily carried inside your handbag or beach tote. TWO SIDE REVERSIBLE: You can wear it on another side and it will give you totally different style.