The First Sports Bra Was Literally Just Two Jockstraps, Sports bras literally started as two jock straps.

Sports bra - Wikipedia

The 'jockstrap' that revolutionised women's sports - BBC News

Sports bra - Wikipedia

The Shefit Ultimate Sports Bra Provides Lab-Proven Support

Establishing the new fit

Sports Bras, AGAIN – FIT IS A FEMINIST ISSUE

THE FIRST SPORTS BRA WAS A JOCKSTRAP!

The first sports bra was two jockstraps sewn together

The 13 Best Sports Bras of 2024 - Tested by Your Best Digs

Second Skin Science History Institute