Spandex core spun yarn is made of spandex wrapped in short fibers, with spandex filament as the core and non elastic short fibers wrapped around it. The core fibers are generally not exposed during stretching.

    Spandex wrapped yarn is an elastic yarn formed by wrapping spandex fibers with synthetic filaments, and using spandex fibers as the core. Non elastic short fibers or filaments are wrapped in a spiral shape to elongate spandex fibers. There is a phenomenon of exposed core under tension.