Made from 100% Cotton, this navy blue t-shirt for youth-sized kids features heroic Star Wars characters and an ominous Darth Vader rendered in their earliest forms by Star Wars concept artist, Ralph McQuarrie, printed with light sensitive, UV-Ink! What's UV-Ink? Why, it's a color sensitive print that, when exposed to a significant light source, changes color! In this case, you wear it outside on a sunny day.....prepare for the magic of Lucas Ltd.! Look! It's Brighter! You're welcome!