Near the end of 1970, Supergirl stopped using
her original costume.
Throughout the early 1970s, readers would send in
costume designs and suggestions, many of which Supergirl would wear
in the pages of her comic-book. Sometimes she would try on one
of these costumes for only a single panel, but sometimes she would try
one out for a few issues.
She finally settled on a look consisting of a blue blouse with a small
red "S" emblazoned on the upper-right, a short cape, red
hotpants, and a decorated yellow belt. Initially, the shoes were very
low with rolled tops, but in the mid 1970s she abandoned them in favor
of her original Superman-style boots. Around that time, she also
removed the fringe from her pants.
She continued to use this costume until 1983.