Denier

Denier is a weight measurement used to refer to fineness of a yarn or fiber. When measuring denier, the lower the number, the finer the fiber; the higher the number, the heavier the fiber. In clothing, 70-denier fabric is strong, heavy and usually used in tough shell garments; 30-denier fabric is lightweight and usually found in insulated garments such as down jackets. Cordura® may be rated as high as 1000-denier and is used on gear that may be subjected to demanding use.