This shirt has sound-activated sensor bars that light up when you’re around music. This will flash anywhere that there’s music playing loudly… a party, a concert, etc.
It’s made out of a mix between cotton and polyester and comes in multiple sizes. The shirt does require 4 AAA batteries that are not included.
If you scroll down on the seller’s website, you can see an animated image showing exactly how the shirt looks when active. Or you can view it directly here.