Our hats are made from 100% polyester witch is super durable. UV resistant, chlorine resistant and will with stand countless hours of play. Designed for Adventurous babes. We all know how harsh the NZ sun can be. They can be worn in the pool. They feature a chin strap with a brake away clip. The brake away clip is a safety feature. Size 1-3 years 53 cm in diameter. Preschool tested!