Shaw's Winchester level loop is manufactured from 100% Olefin. This carpet is inherently stain resistant and even offers a 5 year limited warranty. Practicality meets function with this construction type. This carpet is one of the most durable carpeting solutions for informal areas such as basements, offices and children's play rooms. Level loop carpets are built to with stand the test of time. You will love the low maintenance and carefree attributes this construction type offers.