Mia Surfboard Zip SwimsuitSPF 50. Double Lined Throughout. High quality. Perfect for spring & summer swims! 85% Polyester, 15% Spandex All of our swimsuits are unique, one of kind designs to delight your child. They are fade resistant and have quality upgraded zippers to work freely for multiple seasons of wear. Bottoms are made modest for full coverage with good elastic in legs that will not loosen over time. Swimsuits fit true to size. We recommend sizing up if you want more