even while putting it through its paces

It's construction is cotton that is rated for UPF50+

Please specify in order comments desired tie color

this hat provides great coverage

Peter Grimm - Bananas Lifeguard Hat Accessory size:One size even while putting it throughProtect yourself in style with the Peter Grimm "Go Bananas" Lifeguard Hat. Featuring a lined 4. 5" brim for maximum UPF50+ Sun Protection, an adjustable chin cord, and an elasticized sweatband for size & comfort. The Details: 4. 5" Lined Brim UPF50+ Sun Protection 100% Herringbone Woven Straw Chin Cord for the wind Elasticized Sweatband One Size Fits Most (Approx 58cm or 22. 8")