Jenny Beavan, who took home the Costume Design Oscar for Mad Max: Fury Road, said that as soon as she and Charlize Theron connected, they quickly realized that practically-speaking, the originally intended look for Furiosa just didn’t fit the character. Theron actually fought to give the famed character the look she is remembered for. In her words:
Article source: https://www.cinemablend.com/news/2496351/why-mad-max-fury-roads-charlize-theron-was-worried-about-her-original-costume