This hat is likely to be a Hot Topic exclusive.
It's the "Race Team Style Sonic Cap Hat". The black cap is covered with lots of colorful, embroidered patches to resemble a race-car drivers' sponsor-covered hat. Only these patches...are only to do with Sonic!

The front of the cap has a nice classic Sonic art embroidered large in a blue rectangle. The sides have a "91" disk (for the year) the word "Cham-Pion" in a square, rings, the #1, the word "Sonic" in a circle & "Speedster". The various patches give this a unique look for your cap collection. This is an early 2017 item.