Armycrew UPF 50+ Moisture Wicking Breathable Stretchable Summer Visor Hat. 95% Polyester , 5% Spandex. UPF 50+ sun protective breathable and stretchable sun visor hat for all summer outdoor activities. Moisture wicking fabric, Dry fast technology, Advanced breathability, Rapid absorption. Fitted with an inner terry cloth sweatband. Finished with an adjustable elastic strap closure. One size fits most with flexibility.