Types of Carpet fibers and durabilty
Inherently, polyester is mold and stain resistant. It typically takes a bit more care to keep it's retention. The Carpet and Rug Institute recommends regular cleaning using hot water extraction. Polyester is less expensive to manufacture which provides extra savings when you're on a budget.
Inherently, more durable and popular among retailers. Nylon is very resilient and great for those busy lifestyles. The extended life Nylon provides is it's best selling point.
Triexta is a patented fiber that's a polyester base with a corn oil added to assist with durability.