This is the Diesel D-ebra-s1 Long dress in black polyester.
Diesel
Iro
Alexander Wang
Rick Owens
Simkhai
Retrofete
Balmain
Courreges
Entire Studios
Palm Angels
Christopher Esber
Cult Gaia
Maison Margiela
Alex Perry
Marni
Anine Bing
Mugler
The Attico