Material: This baby sun hat is made of high quality polyester (UPF 50+ sun protection). Quick-drying, breathable toddler visor keeps baby cool and comfortable.Measurements: Hat circumference (3 sizes): Infant Hat 0-6 months: 17.7-18.9 inches, Infant Hat 6-24 months: 18-20.2 inches, 2-5T: 20.2 inches. The elastic back adapts to your baby's head and grows with your baby. Customize the fit by adjusting the tie around your baby's chin.Design: This wide brim hat flies! It's also quick-drying, wrinkle-free, extremely lightweight, machine washable, and stain-resistant. Perfect as a toddler hat or children's hat. Neck flap provides extra sun protection.Suitable for Travel: These baby hats are lightweight and foldable. So this baby boy hat is very convenient to carry in your bag.Applicable occasions: Beaches, park picnics, pier walks and other outdoor activities.