Chapter 11 of the Taiwan Report described what types of clothing were generally worn, as well as their availability in-country. It also provided tips for clothing maintenance.
Many people had clothes custom made while I was there in the mid-seventies, though I think it was more common a few years earlier. Friends of mine who visited Hong Kong said that they could visit a tailor in the morning to pick out a suit style and fabric and be measured, return for a fitting in the afternoon and have the suit delivered to their hotel by evening.
My wardrobe was pretty simple in those days. Still is, come to think of it. Anyway, what I remember most is how the high humidity and frequent rainfall made everything feel damp most of the time. I had just spent about five years in Colorado Springs, with its cool and dry climate before heading to Taipei, so it was quite an adjustment.
After leaving USTDC, I was assigned to a base near Houston, Texas, and barely noticed the high humidity there.