Saitama is an ordinary-looking bald man with brown eyes, a thin but well-built physique, and is of average height and weight. He used to have a full head of short black hair but lost it due to the intensity of his hero training regimen. (100 pushups, 100 situps, 100 squats everyday for 3 years.) He's insanely strong, and defeats anything and everything in one punch, giving him his title of the "One Punch Man".