Filament is the basic state of the fiber when made. It’s very much like fishing line. Filament is very strong, and holds dye very well, if applied properly.
Spun polyester is filament fiber that is softened through agitation and chemistry. It is much softer and absorbent (ad-sorbs) than filament. While spun polyester is long-lasting in wear-life, it has a softer hand, and can actually resemble cotton (without the lint).
Most of the polyester apparel on our website is 100% spun polyester.
Filament polyester is used in aprons and napery. In some cases, napery has filament in one direction and spun poly in the other direction, which provides great strength along with comfortable “hand” (feel).