Naimo Baby Toddler Cute Bucket Hat Sun Hat with Chin Strap Cotton fabrics and UPF 50+ for best sun protection and comfort Adjustable Removable Safety Chin Strap For Secure Fit. Velcro chin strap so it does not blow away in wind Head circumference: 18 inches (fit about 0-24 months) Packable for easy storage and travel Hand wash only, No bleach, Dry flat, No iron and No dry cleaning