Spandex(segmented polyurethanes) is one of the elastomeric fibers. Elastomeric fibres possess extremely high elongations at break and that recover fully and rapidly from high elongations up to their breaking point. Some other examples of elastomeric fibres are crosslinked natural and synthetic rubbers, anidex fibers (crosslinked polyacrylates) and the side-by-side biconstituent fiber of nylon etc. The elastomeric fibers are used in specialized applications where high elasticity is necessary within the textile structure. Spandex enhances the elasticity and recovery of the garments. Till the time you are buying the right size and the appropriate percentage, you would enjoy wearing spandex.
Swimming costumes, gymnastics wear, stockings, cycling shorts cannot be imagined without spandex. Spandex provides additional support, embraces and increases the movability of the wearer in addition it helps the garment to recover its shape(recovery). Spandex is an addition of a function to the garments, it keeps the clothes closest to the skin, in shape along the feel of hugging. Moreover, spandex helps in making the fabrics dimensionally more stable( especially natural fibres made clothes which have a tendency to shrink after washing)
There are few disadvantages with spandex
Lots of creases can be seen in fabrics without heat setting.
if the garments are undersized then additional stretch can trouble more.
Body shapers and Compression wears (where spandex can be up to 30% along with synthetic materials is really a matter of concern and depends upon the suitability of individuals. * Spandex percentage more than 10% And wearing it for a long time can cause rashes and a problem with localized blood circulation.