Millymook & Dozer Hats are the 1st choice in sun-hat protection ensuring sun-safety while swimming, playing or enjoying the great outdoors. This Australian brand is known for high quality fun and fashionable styles for the younger explorers. UPF 50+ sun protection. Small 44cm (0-12m) / Large 48cm (12-24m). All styles have a break-away chin strap to safely keep hats on active heads.