Brunette Girl Undresses Her Black Underwear On The Couch

Another common undergarment of the late-19th century for men, women and children was the union suit. Invented in Utica, New York, and patented in 1868, this was a one-piece front-buttoning garment usually made of knitted material with sleeves extending to the wrists and legs down to the ankles. It had a buttoned flap (known colloquially as the "access hatch", "drop seat" or "fireman's flap") in the back to ease visits to the toilet. The union suit was the precursor of long johns, a two-piece garment consisting of a long-sleeved top and long pants possibly named after American boxer John L. Sullivan who wore a similar garment in the ring.
The jockstrap was invented in 1874 by C.F. Bennett of a Chicago sporting goods company, Sharp & Smith, to provide comfort and support for bicycle jockeys riding the cobblestone streets of Boston, Massachusetts. In 1897 Bennett's newly formed Bike Web Company patented and began mass-producing the Bike Jockey Strap.
• 1900s to 1920s
By the early 20th century, the mass-produced undergarment industry was booming, and competition forced producers to come up with all sorts of innovative and gimmicky designs to compete. The Hanes company emerged from this boom and quickly established itself as a top manufacturer of union suits, which were common until the 1930s. Textile technology continued to improve, and the time to make a single union suit dropped from days to minutes.