Specially treated with their innovative No Fly Zone insect repellent to keep the biting bugs at bay, the wide brimmed bucket style No Fly Zone Solar Sombrero from Simms features a UPF 50 protection rating from the sun's harmful rays. With its durable and airy 100% nylon construction, this lightweight hat features an adjustable, removable chin strap and an easy-fit Lycra sweatband to keep sweat out of the eyes. One size fits most, the No Fly Zone Solar Sombrero from Simms is sure to please!