Over-the-knee boots (or cuissardes, which include thighboots, top boots, hip-boots, and waders) are long boots that fully or partly cover the knee. Originally created as a man's riding boot in the 15th century, in the latter part of the 20th century, the style was redefined as a fashion boot for women. Over-the-knee boots are also used as a work boot in circumstances requiring additional protection for the legs (e.g. fishing waders).
Over-the-knee boots first became popular as riding boots for men in the 15th century, when the growing popularity of doublet and lightweight hose meant that extra protection was required for the legs when on horseback. This was also linked to the decline in the use of full plate armour as the use of firearms became more widespread in warfare. Heavy cavalry in the 16th and 17th centuries had only limited armour, in the form of a helmet and breastplate, or cuirass. Thigh-length boots in heavy leather provided additional protection for the legs. Today, many cavalry regiments still retain these high boots for ceremonial dress.
Riding boots of this style were widespread in the 17th and 18th century, and remained in common use through to the late 19th century. They are the likely source of the term , which originally came from the practice of concealing hip flasks of alcohol in the legs of boots. Because of these historical associations, cuissardes came to convey an image of potent masculinity, conjuring up images of cavaliers, pirates, or musketeers.
The earliest examples of women wearing over-the-knee boots come from the traditional principal boy role in pantomime theater, in which the young male protagonist of the play is played by a young actress in boys' clothes. These breeches roles were also a rare opportunity for an early 20th century actress to wear a revealing costume, potentially increasing the size of the audience. When playing historical characters such as Dick Whittington, the principal boy would often wear over-the-knee boots as part of her costume, emphasizing her swashbuckling, heroic character.
The adoption of over-the-knee boots as a fashion item for women began in the early 1960s. In 1962, Balenciaga's fall collection featured a tall boot by Mancini that just covered the knee and the following year, Yves Saint Laurent's couture collection included thigh-length alligator skin boots by designer Roger Vivier. These were based on a design originally produced by Vivier for the dancer Rudolf Nureyev in the ballet Swan Lake. The adaptation of hyper-masculine boots as fashion footwear for women has been interpreted as part of a broader 1960s trend against the femininity of Dior's post-war "New Look".