For the first time, there's a carpet that provides both unparalleled performance and environmental benefits. SmartStrand™ with DuPont™ Sorona® renewably sourced polymer offers a combination of permanent built-in stain protection, superior durability and amazing comfort. Partially made with renewable resources, Sorona® is one of the most revolutionary materials to hit the carpet industry in 20 years. And it will change the way you think about carpet.