I am unclear what this means. Did you intend to say "highly functional"? And what is a PS? I thought of Polo Shirt, obviously, but it did not make sense given the context. Also, earlier you referred to OCUD shirts, and that escaped me too. (Google was not much help in either case).The breast pocket flap on the jacket is high functional, preventing adding a PS
Perhaps these abbreviations are something very obvious that I'm missing -- you know, I'm getting old!