"Noted for luxury and softness, wool has a high build of all natural fiber. In fact, it's natural ability to repel water and resistance to breaking and compressing makes it a very popular material for higher-end rugs."
"Like Polypropylene, nylon is extremely durable, stain resistant and low in moisture absorbency. Nylon fibers feature a soft luxurious texture and rich, lustrous appearance. A great advantage of polpropylene and nylon rugs is that these non-porous fibers are essentially stainproof and resistant to soiling from almost any chemical. Also, both types produce little if any shedding and, being synthetic they are less likely to affect those who struggle with allergies."
"Polypropylene is a petroleum-based fiber formed into yarns by a process of extrusion, whereby pre-dyed polypropylene pellets are melted down and extruded into a continuous fiber. Strong and colorfast with a soft wool-like feel. polypropylene resists wear and stains. It is value-driven and the predominant machine-woven synthetic fiber with the power to compete with the best wool rugs."