Nylon carpet has benefits that include high resilience, fibre memory, stain resistance, affordability and easy maintenance. Nylon is able to be installed in high traffic areas due to the resilience unlike polyester. The fibre memory allows for the return of the fibre to the original state after being bent and pressed down from furniture or traffic. There are two types of nylon, type 6 and type 6.6. Type 6.6 is superior as it is stronger and more durable. Water does not affect nylon carpeting, and it is resistant to mold and mildew. The downfalls to nylon carpet includes the ability for certain substances to stain the carpet, and the static it creates when walked on. Nylon is easy to clean, but can sometimes stain from food, bleach or strong acids. There is sometimes a treatment that is applied to the fibre during manufacturing that creates more stain resistance and can have anti-static properties.