Steve Jobs’ well-known uniform of turtle-neck, jeans and Jerry Seinfeld-style running shoes was not simply a case of a fashion-hating tech CEO being lazy. Rather, it was all down to Sony’s factory floor uniform and a friendship with fashion designer Issey Miyake.

The new info comes from Jobs’ official biography, due out in a fortnight. In it Jobs says he was interested in Sony Japan workers’ uniforms, designed by Miyake. Initially, Jobs wanted Apple staff to wear similar clobber, but was roundly booed when he suggested the idea.

However, Jobs loved the idea of a personal uniform, and had Miyake make some special turtle-necks for him. “I asked Issey to make me some of his black turtlenecks that I liked, and he made me like a hundred of them,” Jobs told biographer Walter Isaacson. "I have enough to last for the rest of my life."

Jobs was never seen without his trademark top on in later life, always donning the same outfit for his famous keynotes and occasional forays in public.

Via MacRumors