I'm thinking that the 100% cotton Green Lantern Worn Symbol T-Shirt looks like that because it happened to survive the Blackest Night...and the Brightest Day...and the War of Light...and the Rise of the Third Army...and that time somebody flushed the toilet while you were in the shower. So we can pretty much establish that the Green Lantern Worn Symbol T-Shirt has been battle tested and made have some residual defense against the yellow power of fear. Not entirely sure about that last statement however.