Sun Protection: Our baby sun hat is made of 80% nylon, 20% polyester. This hat for girl can protect baby’s head, face and neck from the sun. With UPF 50+ protection, our baby boy hat with extra back coverage blocks 98% of UV Rays in summer. Wide brim help protect & shield your little angels face and eyes from the harsh UV sun rays as they play outside. Windproof&Breathable: Tighten the chin strap to prevent strong winds from blowing away this toddler beach hat. These baby girl hats have two side ventilation holes offer added breathability to help keep your baby's head cool. Grow with Baby: The head strap and the chin strap are adjustable, so you can adjust it to fit and expect it to last for a long time. We have incorporated a moisture wicking head band to keep sweat out of baby’s eyes. Size Information: The kid summer hat has two sizes to fits most babies. S(46-50cm) is great for 6-12Months; M(50-54cm) is great for 2-6Years; L(54-58cm) is great for 6-12Years. Besides, you can adjust the size by the strap at the back to fit your baby's head.The age is only for reference, you can choose sizing according to your baby's head girth. Lightweight&Easy Fold: Lightweight and soft fabric make boy beach hat be easy to fold up and take with baby everywhere.Not only that, your little one will stay comfy as they barely feel like they're wearing this hat. The toddler boy hat is great for camping, hiking, traveling, boating, fishing, safari or any outdoor activities.