Let's answer this question slowly: Would hypothermia be a concern for a human wearing zoot suit on Triton?
A zoot suit was a man's suit of an exaggerated style popular in the 1940s. Triton is one of the coldest planets in the solar system. Triton is located about 2.8 billion miles from the warmth of the sun. Triton has an average temperature of -235.0°C. A zoot suit is made of thin material such as cloth. So the answer is yes.