Kraus carpeting features Strudon XP advanced carpet fiber. Strudon XP fibers feature a distinctive Reflex Wave shape, for superior performance in heavy residential use. Strudon XP fibers are also very tightly twisted to create a fine pencil point texture that stays beautiful for years. Strudon XP is solution dyed, so the color goes right to the core of every fiber for lasting resistance to spills and repeated cleanings. Krause is so sure of the performance of their carpets that they offer up to 7 years texture retention warranty and up to 10 year stain proof warranty.