How to wear slouchy pants:
Work: tailored white shirt, skinny belt, and booties (or pumps).
Day (casual): t-shirt, leather jacket, ballet slippers, and of course a ladylike bag (ex: Lanvin handbags)
Night: there are many ways you can go, loose fitted tank, silk button-down (unbutton 3-4 buttons), or a rock a corset, strappy sandals, or heavy-duty platform shoes.
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Dries Van Noten
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Michael Kors
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Bottega Veneta