All-white 'ghost embroidery' that changes to purple and orange when activated by the sun. You'll get the brightest colors on a sunny day in the summer, but you can always check your local UV Index at this link. On a cloudier day you'll get an effect more like the photo labeled 'a little sun'.
ghost embroidered. 50/50 cotton/poly blend crewneck sweater. Slightly Larger Fit (US) - Size down for a slimmer fitted look. Model is about 5'9, wearing a size Large.
I check every order before sending them out to make sure they light up properly with a UV flashlight. You can get one for around $10 on Amazon if you want one to play with.