This sun hat is made of quick-drying, breathable polyester, durable, and easy to use. The sun hat is rolled up in a bag, you can put a weight on it for a while to flatten it. Quick-drying, breathable polyester. Sun hats fit both baby girls and baby boys, toddlers, and kids with fully adjustable head drawstring. Allow you to size up so you can use the same sunhat for multiple seasons.