Material: Baby sun hat is made of 99% polyester,50+UPF,soft, skin-friendly, breathable and comfortable, perfect for newborns. Baby hat size: Newborn hat 0-6 Months (17.3-18.1),infant hat 6-24 Months(18.9-19.7),toddler hat 2-4 T (20.5-21.3). Adjustable drawstring: The elastic back rope can be adjusted in length according to the size of the baby's head, and the rope next to the chin can be adjusted to me the hat more suitable for the baby's head. Travel essentials: The foldable design of this toddler sun hat is very convenient to carry, with a fully covered neck and a wide front brim to prevent baby from being exposed to ultraviolet radiation during travel. Perfect gift choice: This baby hat is the perfect gift for children, boy, girl, toddler, newborn, baby in various seasons such as spring, summer, autumn, etc. It is suitable for going to the beach, fishing, camping, and other outdoor activities. Material: Baby sun hat is made of 99% polyester,50+UPF,soft, skin-friendly, breathable and comfortable, perfect for newborns. Baby hat size: Newborn hat 0-6 Months (17.3-18.1),infant hat 6-24 Months(18.9-19.7),toddler hat 2-4 T (20.5-21.3). Adjustable drawstring: The elastic back rope can be adjusted in length according to the size of the baby's head, and the rope next to the chin can be adjusted to me the hat more suitable for the baby's head. Travel essentials: The foldable design of this toddler sun hat is very convenient to carry, with a fully covered neck and a wide front brim to prevent baby from being exposed to ultraviolet radiation during travel. Perfect gift choice: This baby hat is the perfect gift for children, boy, girl, toddler, newborn, baby in various seasons such as spring, summer, autumn, etc. It is suitable for going to the beach, fishing, camping, and other outdoor activities.