In 1934, Colley was handed a new assignment: help pioneering pilot Wiley Post reach the jet stream and break new altitude records. Post needed a pressurized suit, and Colley designed him one using his wife's sewing machine. The pressure suit had three layers: the innermost one was long underwear, the middle layer was a rubberized air pressure bladder, and the outer layer was made of rubberized parachute fabric. Rubber boots, pigskin gloves, and a diver's helmet with a removable faceplate were added.