Denier is a unit of measure for the linear mass density of fibers & is expressed in grams per 9000 meters of the fiber

 

• finer denier fibers behave more like down and feel more “fluid or gel-like” and are typically more costly

• coarser denier fibers feel more “springy”.

• true micro-denier fibers will be ≤1 Denier although the feel and performance at this level is not discernable

• finer denier fibers are usually blown into a product