What is Microfiber?
Microfiber is a synthetic fiber that is LESS THAN one denier.

What is denier? Denier is a type of measurement used for textile. It is the measurement of linear mass density of fibers. It is also defined as the mass/weight in grams per 9000 meters.
So a microber cloth that is 1 denier in density and 9,000 meters long will only weigh 1 gram.
These cloths are made from a variety of different materials, including polyester, polyamides, or a mixture of both. Microfiber is utilized in making non-woven, woven, and knitted material.