Black Dance Briefs, Girls Dance Briefs

Black Dance Briefs have been around for ages. They are used by dancers to protect their thighs from the chafing caused by garter belts. [based on a comment from the original post.
Dance brief with flat lock stitch detail.Nylon spandex.

ProWEAR Ruched Dance Brief - GIRLS – Body Wrappers

Dance brief with flat lock stitch detail.Nylon spandex.

Adult Danznmotion Black Dance Brief

Child Jazz Cut Dance Briefs BWP089CBLKI Black Intermediate

Black Dance Briefs

Baltogs Dancewear

OVIGILY Child Black Dance Briefs Jazz Cut Girls Spandex Ballet Dance Briefs Lycra Mid Waist Cheer Briefs Workout Underwear Kids

Girls' High-Waisted Modern Dance/Jazz Shorts - Black STAREVER

Our Regular Dance Briefs are the perfect cut, with just enough length to cover the bottom of your stomach. These briefs are the Goldilocks of our

B Dancewear Girls Dance Brief Child and Kid Sizes Performance Dancer Bottoms

Studio 7 Dancewear, Performance Briefs

Ladies Teigan Full Coverage Briefs, Black – BLOCH Dance US