JFH Sun Hat Headwear Extreme Condition - UPF 45+ 11 Colors COMPLETELY RE-DESIGNED FOR 2017 SPRING HIGH QUALITY MATERIALS & HAND CRAFTED DURABILITY: Imported Polyester Blend will ensure efficient moisture wicking, while. This outdoors piece is crafted to outlast! HIGH FUNCTIONALITY: 4 metallic meth grommets provide for stylish ventilation. brim ensure a high level of sun protection, providing shade for where it counts. Neck Flap takes protection one step further by protecting neck from the elements. Chinstrap with Cordlock ensures that the hat stays firmly planted on your head. ADULT & CHILDRENS SIZING: Adult's hat measure's 7 & 3/8" for internal diameter. Crown measures 4.5" tall, and Brim measures 3" out. Children's sizing measures 6 & 3/4" for internal diameter, 4" crown height, and 2.5" brim SATISFACTION GUARANTEED: All JFH Branded products come with an unconditional 60 day satisfaction guaranteed. Our products are designed and created to provide unparalleled quality and functionality