What do you wear to dive from the edge of space? Four years ago, daredevil Felix Baumgartner put that question to designers at the David Clark Company, which made the pressure suits worn by the U.S. Air Force’s high-altitude U-2 pilots. The designers responded by building the most advanced pressure suit ever created, with a powered heating system, a stable aerodynamic profile, and a face mask embedded with heated wires to prevent freezing in the -70°F air. On October 14, Baumgartner put on his suit and rode a helium balloon to an altitude of 128,100 feet. With millions watching on television and YouTube, he jumped, reaching a top speed of 833.9 mph (Mach 1.24) before deploying his chute and landing safely in the New Mexico desert.