Pantyhose
Pantyhose (called tights in the United Kingdom and a few other countries) are sheer hosiery. They are close-fitting legwear, which cover the wearer's body from the waist to the feet. Mostly considered to be a woman's and girl's garment, pantyhose appeared in the 1960s as a convenient alternative to stockings and/or control panties (which, in turn, replaced girdles).
Like stockings or knee highs, pantyhose are usually made of nylon, or of other fabrics blended with nylon. Pantyhose are designed to:
be attractive in appearance,
hide physical imperfections such as blemishes, bruises, scars, hair or varicose veins,
reduce visible panty lines, and
ease chafing between feet and footwear, or between thighs.
Besides being worn as fashion, in Western society pantyhose are sometimes worn by women as part of formal dress. Also, the dress code of some companies and schools may require pantyhose or fashion tights to be worn when skirts or shorts are worn as part of a uniform.
Terminology
The term "pantyhose" originated in the United States to refer to the combination of panties (an American English term) with sheer nylon hosiery. In British English, these garments are called "tights", a term that refers to all such garments regardless of whether they are sheer lingerie or sturdy outerwear.