Avoid Berber carpeting unless you plan to be very careful with your basement. It snags easily and isn't resilient, making it a bad choice for people with children or pets. Frieze carpet, on the other hand, has strong, densely-packed fibers that are less likely to show footprints or other pressure marks. Looped pile carpet is more likely to snag than cut pile carpet. Any carpet with a high pile density and a tight twist construction should hold up to high-traffic and lots of wear. Choosing a carpet suited for outdoors helps to reduce wear on the carpet but makes it less comfortable to rest on or walking barefoot over it.
Carpets with natural fiber will not hold up well to strong cleanings or high-traffic stress. A carpet with olefin face fiber can stand up to chemical washings. If the basement is exposed to a large amount of water, olefin face fiber will be refreshed after a strong cleaning.
Avoid jute backing, common on inexpensive carpets. The weave is like that of a potato sack and will not inhibit moisture from leeching onto the carpet. A carpet with synthetic backing, especially a strong polyurethane backing, will keep water out more reliably. Polyurethane backing also offers anti-edge raveling and bonds to nylon fibers, which will keep your carpet from wearing thin in high-traffic areas. Put an antimicrobial pad under your carpet, whatever kind of backing you select to help keep it safe from moisture and mold.
Selecting a dark-colored carpet for your basement can help it feel more intimate. Light or bright carpets tend to expand the space of a room, which is helpful if your basement is small. If you plan to change your decorating scheme on a regular basis, select a neutral color for your carpet so it will continue to look nice when you change your basement furniture.