84% Nylon, 16% Spandex Machine Wash Baby sun hat is made of 84% Nylon, 16% Spandex. Breathable, Quick-dry UPF 50+ fabric is chlorine and saltwater resistant Infant Sun Hat with UPF 50+: With UPF 50+ protection, the infant hat with extra back coverage blocks 98% of UV Rays; Our UV hat has a 7 cm brim which will never flop down and extra back coverage, so the baby sun hat provides a better protection for your baby’s face, ear, and neck; All these ensure that the sun hat lasts for summers to come; Newborn Sun Hat One Hat Fits Most Kids Baby Swim Hat with Wide Brim Never Flops: Our baby sun hat has a wide and stiff brim so that when it’s windy, the brim won’t flop to cover your baby’s face or blow up to be unable to protect your baby’s face from the sun; When your baby plays in the beach or swimming pool, the brim won’t flop when it gets wet; Besides, chinstrap of our baby hats is designed to hold the toddler hat in place; At the back of the hat, we design a cotton strap to adjust the size to ensure it is comfortable to wear; Baby Summer Hat Wash Instruction: 1.Hand wash or machine wash in cool water on low setting/ gentle cycle; 2.Use eco-friendly, non-chemical detergent before soaking for 10 minutes; 3. Air dry the baby hat; 4. no bleach and no iron;