There are two types of nylon fibers in the carpet industry. Nylon 6,6 is the premium fiber in the industry while nylon 6 is also a good option. Nylon 6,6 is the best wearing fiber you can buy and is associated with the name Stainmaster. Names like Stainmaster, Wear Dated, and Anso are all nylon carpet fibers. Typically, if you are buying a carpet with a face weight of 30 oz or less and want decent wear ability then your choice should be nylon. We highly recommend buying a nylon 6,6 fiber over any other fibers if you're looking for the longest lasting carpet.