This got me checking my ss linings. My last one has bemberg jacket lining and 60/40 viscose/poly trousers lining. Pretty sure sleeves are the same as trousers. one of my 3y old has 100 poly, so yes no way they take sleeves into account, but this is getting overkill IMO. Fwiw I haven't notices any difference in breathability between my various lined trousers, so wouldn't worry about it.