Wool:
Noted for its luxury and performance, wool is soft, has high bulk, and is available in many colors. Generally, wool is somewhat more expensive than synthetic fibers.

Acrylic:
Offers the appearance and feel of wool without the cost. Has low static level and is moisture and mildew-resistant. Commonly used in velvet and level-loop constructions, and often in bath and scatter rugs.

Olefin (polypropylene):
Strong, resists wear and permanent stains, and is easily cleaned. Notably colorfast because color is added during fiber production. Resists static electricity and is often used in both indoor and outdoor installations because of its resistance to moisture and mildew. Used in synthetic turf for sports surfaces, and in the home for patios and game rooms. Many Berbers are made of olefin.

Blends:
A wool/nylon blend combines the superior look and comfort of wool with the durability of nylon. Acrylic/olefin and nylon/olefin are other popular blends, offering good characteristics of each fiber.

Nylon:
Nylon is by far the most prevalent fiber and is available in carpet as are made from petroleum-based chemicals, with differences between the two associated with the manufacturing and dyeing processes. Either is good for use in public facilities. Nylon has excellent wearability, abrasion resistance, resilience, and is favorably priced. Solution dyed nylon is also resistant to harsh cleaning chemicals and sunlight fading.