Hat circumference: 55-58cm (with adjustable cord inside sweatband) Foldable: You can fold the hat into a small space and put it in your pocket, also fits in your handbag. Closure: drawstring Fabric: 100% cotton; Lining: 82% polyester, 18% cotton. UPF 50+: the 4"-4.5" brim offers full coverage of the head & face. Perfect for summer, vacation, beach, garden. LIGHT & AIRFUL: the sun hat is made of a really comfortable light material. DETACHABLE chin strap: keeps it securely on your head in windy conditions. Foldable Summer Hat Wide Brim Women's Sun Hat Upf 50 With Neck Protection