This youth-size Marvel Comics t-shirt uses UV solar technology on the printed ink, allowing the shirt to change color when exposed to sunlight! Indoors, the print is a beige (unsaturated) color. Outdoors, the shades change into a variety of vivid comic-art colors. All your favorite Avengers are represented: Spider-man, Captain America, Thor, Hulk, Wolverine, Iron Man, and the Silver Surfer.