The corset era, then the ribbon
Rigid, boned corsets defined the S-bend Edwardian shape until Mary Phelps Jacob's 1914 patent for a soft, laced "backless brassiere" offered the first widely-copied alternative.
Flat, boyish bandeaus
The flapper line called for a flattened chest. Simple bandeau bras minimized the bust, though underwire and adjustable straps quietly appeared beneath the surface.
Curves return, cups get letters
"Brassiere" shortens to "bra." S.H. Camp & Co. introduces A–D cup sizing in 1932, and separate, rounder cups replace the flattening band of the previous decade.
The bullet bra
Pointed, stitched "torpedo" cups defined the pin-up "sweater girl" look worn by stars like Jayne Mansfield. Spandex, invented in 1959, set up the next shift toward stretch and fit.
Mainstream marketing, and a "freedom trash can"
Advertising to teenagers went mainstream, even as late-decade feminist protests — misremembered as "bra-burning" — and the braless hippie look pushed back against structured foundation wear entirely.
The sports bra arrives
In 1977, two jockstraps sewn together became the "Jogbra" — the first bra engineered purely for movement, and the ancestor of an entire modern category.
Lingerie as outerwear
Structured, conical shapes reemerged as fashion statements rather than secrets — most famously Jean Paul Gaultier's pink satin cone bra, worn over a suit on Madonna's 1990 Blond Ambition Tour.
Push-up drama, T-shirt smoothness
The Wonderbra's "Hello Boys" campaign made the push-up bra a headline. At the same time, new foam-molding and microfiber technology quietly created the smooth, seamless "T-shirt bra."
Wireless, adhesive, inclusive
From the strapless, adhesive NuBra (2000s) to today's wireless bralettes and size-inclusive, direct-to-consumer brands, the trend line has bent steadily toward comfort over architecture.