Spandex

Spandex or elastane is a synthetic fiber known for its exceptional elasticity (stretchability). It is stronger and more durable than rubber, its major non-synthetic competitor. It was invented in 1959 by DuPont chemist Joseph Shivers. When first introduced it revolutionized many areas of the clothing industry. It is one of the most used and best materials in lingerie.

"Spandex" is a generic name and not derived from the chemical name of the fiber, which most manufactured fibers are, but derived by shifting around the syllables in the word expand. "Spandex" is the preferred name in North America; elsewhere it is referred to as "elastane".

The most famous brand name associated with spandex is Lycra, a trademark of Invista (formerly part of DuPont). Such is Lycra's prominence it has become a genericised trademark in many parts of the world, used to describe any kind of spandex. Invista discourages such use, protecting its trademark vigorously.