SIGGI Womens UPF50+ Summer Sunhat Bucket Packable Wide Brim Hats w/Chin Cord Fabric:100% cotton; Lining:20%cotton/80%polyester. FREE SIZE: with an adjustable string at back built-in sweatband. Best fit for 55-58cm 21.6"-22.8" 6 7/8 - 7 1/4. FOLDABLE: folds up easily, compact and perfect as a fishing or travel hats. DETACHABLE CHIN STRAP: adjustable for a better fit; won't blown off when it gets windy. SPF 50+: this sun hat has passed UPF 50+ test, it could block 97.5% or more of sun UV rays. WIDE BRIM: measures 4 - 4.5" in length, large enough to shade forehead, eyes and cheeks from sun uv ray. The shape looks really adorable. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!