Silk is the only natural filament fiber. A mono-filament yarn is made of a single fiber filament. A multi-filament yarn is made of multiple fiber filaments. These may or may not be twisted together. When twisted and heat-set, they usually are more durable for floor coverings.
Staple fibers are short fibers measured in inches or fractions thereof.
Staple fibers may be natural or manufactured and are spun together to make longer yarns. Because of the short lengths of fibers, staple yarns may be slightly more prone to fuzzing and pilling than filament yarns. A process called parallel spinning produces seven-inch or longer staple yarns that has increased the performance of short staple in carpet construction. Finishes Finishes, either internal or external, are methods of modifying fibers. Some are surface applications that are not durable and must be replaced after cleaning the carpet.