by Franco » Sat 04 Apr, 2015 2:28 pm
Found this on Wiki :
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.