They are expensive, but last a long time. All carpeting falls into two categories, man-made or natural fibers. The fiber is converted into yarn, which is formed into pile. This is the part of the carpeting that is sat upon and walked on. The fiber that you choose will be very important to the price and performance of the carpet.
Wool accounts for a small percentage of carpeting sold today.
It is the oldest and considered to be the most luxurious carpet that you can buy. It is also the most expensive. Wool is not as durable as nylon. Other fiber types include polyester, which is less durable than nylon but is soft to the touch, and polypropylene which is used in most outdoor carpeting. Measure the area to be carpeted.