80% Polyester, 20% Nylon Hand Wash Only Size: Two Size for your choose, 46-50cm=18.11"-19.69"fits 6-24 Months, 50-54cm=19.69"-21.26 fits 2-6 Years. The age is only for reference, you can choose sizing according to your baby's head girth Material: This baby boy sun hat made of high quality polyester and nylon, keep the kids soft and cozy. 50+ UPF, Protect children's head, eyes, face, neck from strong sunlight Design: Special deisgn with lengthen and widen brim can protect neck、eyes and face from the sun. Head strap to adjust head circumference, adjustable chin strap to better suitted to your baby. Easy to wear and pair with other clothes Easy Carrying: Light weight and easy to fold to fit into a pocket. Easy storage, but travel friendly Best Choice: This baby sun hat will be the best choice for your baby in the hot summer to protect head, eyes, face, neck from strong sunlight