The Waldos (incl/esp the current Wavy edition, I think?) are the most recognizable, iconic US look...
Main reason they're not a permanent fixture? Nike think they'll sell fewer shirts if they stick with one look year after year, thus they claim the US *has no signature look*, & change it constantly
Lots of opinions on this being the permanent USMNT kit which is too bad because I think a copy of the Atletico Madrid ones would look best