Multifunctional Flap Cap with Removable Sun Shield and Mask Perfect for Fishing Hiking Garden Work Outdoor Activities 100% polyester Free Size fits most with adjustable buckle. UV 50+ excellent sun protection. Crown measures 5 inches deep, 5 panel, and unconstructed, side mesh; Flap measures 10 inches long, 18.5 inches wide, side mesh on the cap; Mask measures 8 inches long, 11.5inches wide, mesh in the middle to allow breathing. The Cap may help cooling; the Shield will protect neck and ears from sunburn and the mask can protect face from dust.