The 85% polyester 15% spandex Avengers Heads Kids Rash Guard is a versatile and fantastic way for a little one in your life to go out there and get some Sun! Featuring Iron Man, Hulk, Thor, and Captain America, the Avengers Heads Kids Rash Guard even offers a +50 UPF...which means this great swim-shirt can withstand the power of a nuclear explosion from 60,000 million miles away! That's pretty impressive if you ask me.