New photochromic inks react to ultraviolet rays from the sun. Outdoors, your t-shirt is decorated with a bright colorful design, indoors, it fades back to subtlety. New York research studio The Crated teamed up with Print All Over Me to create a collection including baseball cap, t-shirt and backback. They predict garments in the future that change appearance depending on your mood, activity level or just plain old exposure to sunlight.