Olefin carpet, also known as polypropylene carpet, is a synthetic carpet fiber that is used frequently for outdoor rugs or areas where moisture or mold are a concern. It is derived from plastic and is best installed in places with the potential for water damage. Olefin carpet is not as durable as other synthetic carpet fibers, like nylon, and can become matted down fairly quickly, which is why it is typically used in low-pile, looped carpet. It is also better to use it in low-traffic areas to help protect it against matting and wear. One benefit to olefin carpet is that it is water-resistant and does not absorb liquids, making it ideal for areas where moisture may be a problem. This makes it excellent in basements and outdoor areas. Because it does not absorb water, it is not prone to mold or mildew, and it is also stain-resistant. However, one of the main issues with olefin carpet is that it attracts oils, like from food or the bottom of your feet, which can become trapped in the fiber, making it hard to clean. Olefin carpet is considered one of the most inexpensive carpet fibers, but because it is not very durable, it should not be used in high-traffic areas.