Yet another of Sheldon's t-shirts featuring his favoritest super guy, The Flash, this tee is a modern-looking silver take on the fastest man alive's iconic emblem. To purchase one just like it, check out the Amazon link below! NOTE: I've noticed that the wrong image sometimes shows as the thumbnail for the following link, but fret not, I've checked it and, as of now, at least, it directs to what you're wanting ;).
Featured on The Big Bang Theory episodes
Season 12, Episode 05: "The Planetarium Collision"