The Tech A33.2 was one of the uniforms used by field technicians, engineers

Engineer Miscellaneous Roles

and slicers during the Cold War

The Cold War Event Cold War (3653BBY - 3642BBY)

and beyond.
Consisting of a bodysuit (sometimes with a long shirt), gloves, belt and red-trimmed high boots, it was commonly known as the hacker suit. Additional gear included an utility belt with several pouches and tech equipment, armored vest and heavy boots.