Firefighter Calss A Dress Uniforms used to be all poly and one of the marketing bullets was that they were machine washable. What was discovered was that machine washable conveyed the image of cheap (which they were).
In an effort to combat the bad rap, manufacturers put in a lining that required dry cleaning. The dress uniform was the same cheap, it just required dry cleaning. A classic case of ‘much ado about nothing’. Steve Cohen, Pres.