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.

Capezio Girl's Brief

A dancer's wardrobe must, the versatile mesh short! This sheer short is perfect for dance, beach or just as an everyday coverup. The wide leg openings

Black Elastic Waist Mesh Girls Dance Shorts - Select Size

Studio 7 Dancewear, Performance Briefs

Plus Size Spandex Dance Brief, Black - You Go Girl Dancewear

Team Basics Brief - ChildThe Brief scores as an instant staple for dancers and cheerleaders. Features a traditional rise waist and moderate leg line.

Children's Classic Stretch Dance Brief

Bottoms for Children by Capezio®

Black Dance Briefs

BLOCH Ladies Dance Pants Briefs Knickers High Deep Waistband Black