The Columbia Tech Shade Cap in Black is made with Omni-WICK and Omni-SHADE UPF 50 sun protection technology. Finishing touches include an adjustable back closure.Product Information: Product Code: 1819641-010 Made from 100% Textured poplin Nylon. Omni-WICK. Omni-SHADE UPF 50 sun protection. Adjustable back closure.