This dark blue men's tee shirt is more subtly Sonic than other items. It uses only white paint, with some faux wear. In each of 4 squares, there's something at least somewhat Sonic. The first has the letter "S" in the Sonic logo font, the next, a circle swirl shape, found in title-cards for the games sometimes and on other items as a background shape, then a star, and finally a close cropped white outline only modern portrait. The middle has speed-pad type or traction type markings.
This is another item from the Sonicmerchandise.com website, but do keep in mind they only ship to the UK area. This shirt was added to their 2015 fall fashion line up.