AVAILABLE IN PURPLE ONLY. One of our best sellers, because it tells everyone that you're living the best years of your life. Don't slow down or stop having fun. Let everyone know how happy you are right now! Adult sized unisex T-shirt, 100% pre-shrunk cotton. Fully machine washable, with changeable batteries that will allow you to have fun wearing this shirt over and over again! Six embedded lights flash continuously in a random pattern. The two red, green and yellow “super bright” LED’s have an unlimited life and will offer you years of use and enjoyment. Each set of replaceable batteries will power your light unit for up to 20 hours of continuous operation, even longer when worn in short time frames. Please refer to the included instructions for care of your garment and light unit.