Goku is usually recognized by his uniquely styled hair, which never changes its length throughout the series except when in his Super Saiyan forms, in which his hair changes color and length based on the level he ascends to. This is explained by Vegeta to be a common characteristic of full-blooded Saiyans. Due to his devotion to Earth, Goku prefers dressing in a gi uniform, and has refused offers to adorn the Saiyan battle fatigues, being that he considers himself an Earthling.
Source from Wikipeida
Enjoy Up to 46% Off!