Made of superior-quality poly spandex material, these tails are perfect for swimming in fresh, chlorinated, or salt water. Your child will enjoy the soft and sleek feel of this stretchy compression-performance material with 50+ UPF rating for skin safety while playing in the sun. The dye sublimated print is chlorine resistant for extended color life. The tail has a closed bottom with an invisible zipper for easy insertion and removal of monofin.