Bare Spandex Yarn: This is 100% pure spandex filament. Bare yarn is generally not used alone in fabrics but is mostly interwoven with other yarns, requiring special equipment for processing.
Spandex Core-Spun Yarn: This type consists of bare spandex yarn as the core, wrapped with an outer layer of other materials (primarily natural fibers) during spinning.
Covered or Twisted Spandex Yarn: This is made by twisting bare spandex yarn with other yarns (mainly filaments such as nylon or polyester) and is commonly used in weft-knitted spandex fabrics.