The higher the denier, the firmer the fiber and the product it fills. Crimp relates to the fiber's springiness - more is better for firm pillows and less for gentler ones. Another way we bring different benefits to sleepers is by making different fiber types . This affects how our pillows, comforters and mattress pads feel. DuPont also invented hollow fibers, which offer better loft or thickness in pillows and comforters.
Solid fibers do the same, but add a bit more support.
And only DuPont Dacron fiberfill offers pre-blended fibers. We purposely mix a variety of fibers to achieve different levels of comfort. A mixture of hollow and spiral fibers, for instance, is an excellent blend for loft and long-lasting durability. Down-like fiber puffs move freely in a pillow to cradle you as you sleep. And products with DuPont Allerban TM fiberfill are hypoallergenic and inhibit the growth of odor-causing bacteria, mold and fungus in the product.