Sea turtles' lineage goes back 150 million years to the Jurassic period yet they still swims in our waters today. That combo of old and new comes to life in this swim shirt. The block and swirl designs are a throwback to traditional Hawaiian culture. But on the flip side, the fabric, made from polyester (PET) fabric created from recycled plastic bottles, is totally state of the art. Plus, it's super-lightweight and even has built-in 50+SPF and hidden tribal designs that appear when you get it wet.