When it comes to colorfastness, olefin just can't be beat. Unlike nylon's color, which is added on after it has been made into carpet, olefin's color is actually a part of its chemical makeup. Because of that, olefin is also almost totally resistant to any kind of permanent staining. And it resists moisture, mildew and static electricity. The only quality not found in most olefin carpets is the resilience and lush feel that nylon carpets offer. But for all their performance characteristics, olefin carpets can be well worth considering - especially when cost is a concern.