The "BARBIE SIGNATURE FLASH SUPERGIRL DOLL" is a collectible fashion doll released by Mattel in 2020 as part of the DC Universe franchise. This Barbie doll features straight brown hair, brown eyes, and a light complexion, embodying the character of Supergirl. The doll is part of the Black Label series, designed for teens and collectors, and comes dressed in a fashion-forward outfit, showcasing a blend of Barbie's style with the iconic Supergirl character. The doll is made of plastic and is a part of the Supergirl Barbie product line.