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You have no idea how much I want Morgana's cloak | A person wearing a green velvet cloak with a decorative button

comes with Versace Gift Box

The velvet webbing will assist in keeping the dress volumetric and in place, whereas the sheer back and hand attached beads on the sleeves give it the structural texture of a complete lining, which is accompanied, in addition, with easily removable cups under the armpits, making it a practical and high quality piece of garment to be put in as the wedding guest or a semi-formal party

Marked a vintage size 7/8

But what does semi-formal attire mean, and how do you get it right