UV 50+ Protection Outdoor Multifunctional Flap Hat Neck Protection Cap with Removable Sun Shield and Mask Perfect for Fishing Hiking Garden Work Activities UPF 50+ Rating; Breathable Fabric. Material: 100% Taslon UV Protective. Head girth measures 23 inches. Adjustable Velcro closure for a custom fit. The Cap may help cooling; The Shield will protect neck and ears from sunburn and the mask can protect face from dust.