Why Barbie Trades Chanel For Birkenstock, According to the Movie's Costume Designer

PS: The Birkenstock is the antidote to the Barbie heel throughout the film — how did you decide on that? Was it an obvious call?
JD: I have to say, I can't really take credit for that contrast because it was in the script, so Greta put that in. So that was always going to be, but I think it's perfect.