In days gone by, only the style in which one omitted haori (a Japanese half-coat) was particularly called kinagashi, and if only he had haori on, he could be considered to be in a formal costume even if he didn't have hakama on, but now kinagashi often indicate the style without hakama, whether he had haori on or not.
古くは羽織を略したもののみを特に着流しと称し、袴をつけなくとも羽織を着ていれば礼装にかなうとされていたが、現在では羽織の有無にかかわらず袴を着けない様を指すことが多い。