This article of clothing was one of the only things found near Star Laboratories after the The Particle Accelerator event. Whoever wears this black Star Laboratories long sleeve shirt instantly becomes a metahuman. But what will your superpowers be? Everybody is different. The only way to find out is to add this to your collection of Flash merchandise before its mysterious power-giving capabilities wear off.
The Star laboratories long sleeve t shirt is the yin, to your yang. You've found what you're looking for.