The Ultimate Light Up T-Shirt. These ain't no ordinary T-shirt patches. But, electronic patches that light up on the T-shirts and groove to the beat. How? Well a clever mini battery pack is hidden in a small pocket just inside the hem which carries an onboard sound sensor. Foldable and washable these T-shirts are easy to maintain and use like any other T-shirt. With new technology we have enhanced the panels to make them so light and soft, you'll barely feel the weight. You can bling it up in chill-zones such as clubs, concerts, sporting or college events and just whenever you're in a mood to make heads turn... your way!