Nylon—type 6,6

Made with two base chemical ingredients: adipic acid and hexamethylene diamine. Type 6,6 nylon has a tighter molecular structure, making it harder, more resilient and more resistant to stains than Type 6 nylon. In the U.S., where the highest commercial carpet standards are set, over 60% of all nylon carpets installed are Type 6,6 nylon.