The costume is based more on old school Batman's suit than on Batgirl's. And while I usually put her in her full-face mask, sometimes I drop it because she doesn't really seem to care one whit about having a secret identity. And I don't have much use for capes, so I used hers as more of an accent piece. It says, "Batgirl" without the danger of tangling around her legs when she's doing her whirling, twirling, putting her foot through your teeth fighting style.
That's Horizontal Adama to the right, and above him is Yo-Yo Shibuya Schoolgirl Cop or some such.