The Sunday Afternoons Kids' Play Hat offers many unique sun protective features and lets parents rest easy knowing their children are safe playing outdoors. Made with water and stain resistant 100% nylon/polyester fabric with ventilating mesh side panels to keep your head cool. Full 2.5" - 4" down sloping brim with floatable foam core (brim length depends on size) that continues around the sides for cheek and ear protection. Full 5.5" neck veil for protecting back of neck. Packs flat or rolls into a cone for travel. UPF 50+ protection from harmful UV rays. Infants' and Childs' hats have a Smart Strap breakaway chin strap for safety. Youth hats have a chin strap with draw cord. Stroller friendly wear ability. External sizing band for custom fit. Sizing (Head circumference): Infant: 18"-20", Baby: 19.75"-21.75", Child: 20.5"-22.5", Youth: 21.75"-23".