The figure-eight shape was a factory decision: it emerged in 1933 at the Reading Pretzel Machinery Company because it fit the conveyor belt better.
A chewy, salt-flecked soft pretzel sold warm by street vendors and pretzel bakeries, usually eaten on the go with a squirt of mustard.
Why it's made this way: A street vendor was selling soft pretzels in Philadelphia by the 1820s, and pretzel carts and corner pretzel bakeries have been part of city life ever since.