It improves the water absorbency and comfort of their textile materials. The hydrophobic nature of crystalline synthetic fibers gives rise to static electricity. This can be undesirable during yarn and fabric manufacture, as well as during garment manufacturing and subsequent wearing of the apparel. In amorphous fibers, there is the absence of static electricity, usually due to more absorbency of moisture. It is due to this reason that the amorphous fibers are blended with the more crystalline fibers to make the crystalline polymer system more comfortable to wear.