This shirt is printed all over, & lots of fun! It's the "Sonic Rock the Speed" all polyester shirt. With nice big Sonic designs on the front & back, plus a colorful (but not loud or outrageous like the lycra UK shirts) background, it's sure to stand out in any shirt collection. Look at the tag. It's a slim, light blue square with the modern logo. Is a new company in town? You MAY be able to find it at Amazon for 14.99 or at the Sonic Gear Clothing Store in 2012. 

Also if you look carefully at the 'road' beneath Sonic that leads to a desert area of buttes, you'll see "Route 66" in its highway symbol laid out onto the street. This is an old fashion but famous path for sight-seeing in the USA.

This medium blue shirt has a lot of white paint splat/spatter for the background, much more than usual. Thumbs-up modern Sonic is in a pale blue ring above the red-outlined logo. Splatty, scratchy paint in bars or splashes is becoming a bit of a common theme in the modern styled shirts. It's just fine if you don't already have something pretty similar, but it doesn't bring much new to the table, either. This is a 2013 item, but where can you buy it?

Here is a black tee with 3 different modern Sonic portraits. Each portrait is in a colored rectangle, and leaves the arm/hand to cross the border of the rectangle. A wide band of blue checkers ties everything together down the front, with a small modern logo at the bottom. This is a JC Penny shirt for summer 2013, in the boys/teens section. It should be about 10 dollars. It was released again in summer 2014, but this time the whole tee is bright hot

green. Notice how it makes the design look really different, even though all of the same ink colors were used. It's still at JC Penny in 2014.