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Wikipedia: Culottes are an item of clothing worn on the lower half of the body. The term can refer to either split skirts, historical men's breeches, or women's under-pants; this is an example of fashion-industry words taken from designs across history, languages and cultures, then being used to describe different garments, often creating confusion among historians and readers
Sounds about right.
They're called strappy culottes.
And let's take note of the PAS approved model