Ultimately, the value of scarves is decided 80% by their fashion features, that is, whether they go well with clothes and the remaining 20%, by the need to wear them in cold weather.
(the value of scarves; is decided that is; T:Ultimately) (they; go well; with clothes and the remaining 20%)
the value of scarves they
is decided that is go well
T:Ultimately
with clothes and the remaining 20%