SUN PROTECTION:Smooth and soft polyester, UPF 50+ sun protection blocks 98% of all UV radiation ONE SIZE:Hat Circumference: 19.3-20.9 inches(49-53 cm), fits most children ages 2-6 BREATHABLE:The mesh vent around the crown provides ventilation, keep your little one cool and comfortable ADJUSTABLE:The chin straps holds hat in place and an elastic drawcord with toggle at back for comfortable wear Muti-Functional: This breathable & packable safari sun hat is a must-have for summer. Ideal for wearing in outdoors. It is a perfect hat for kids playing at the beach or in the backyard, go to fishing, hiking, camping, traveling, boating or any outdoor sports and activities. Connectyle unisex kids outdoor sun hat is made of polyester fabric, cool and comfortable. And it is 50+ UPF for complete UV ray protection of your face, ears, and neck. Hat circumference:19.3"-20.9", one size fits most children ages 2-6. The chin strap holds hat in place on windy days, elastic drawcord with toggle at back for adjustability.