microfiber

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mi·cro·fi·ber

M0273175 (mī′krō-fī′bər)n. An extremely fine synthetic fiber that can be woven or knit into textiles with the texture and drape of natural-fiber cloth but with enhanced washability, breathability, and water repellancy.

mi•cro•fi•ber

(ˈmaɪ kroʊˌfaɪ bər)
n. a very fine polyester fiber, weighing less than one denier per filament, used esp. for clothing. [1985–90]