The Sunday Afternoons Sun Tripper Cap offers effective sun protection performance in stylish urban fashion. A great sun hat to introduce your teens to the important concept of sun protection!Constructed of 100% nylon. UPF 50+ certified breathable sun fabric (mesh vents not rated). 2.5 inch folding brim allows cap to be packed and put in a pocket. Internal crown pocket. Slipstream mesh venting panels. Adjustable sizing for comfortable fit. Internal wicking sweatband. Stain and water resistant. Hand wash, line dry.. Lightweight: (2.6 oz.).