If you twist the yarn tightly, the tufts become more distinct and bend every which way. Instead of standing close to form a smooth surface, each tuft becomes an individual. And that's the secret to the nubby look of friezes. Friezes are made in a variety of densities ranging from a neat nub to the new, random, loose look from California. Rich colors look especially great in the highlights and shadows of this carpet's surface. Highly resilient, it's truly trackless, easy to clean, and crush resistant.
One of the most popular styles, it comes in wool and man made fibers. Variously described as "Hardtwist" the yarn has been given an extra turn or two and this results in a rougher surface texture which is less prone to showing footmarks.
A good quality Frieze styled carpet can be one of the most durable styles you can buy. With its heavy texturing, it also exhibits some of the same characteristics as the Textured style, such as its ability to hide footprints and vacuum lines, as well as holding up extremely well under heavy traffic.
Frieze Carpet Guide