This is a wonderful rug!!  The colors are vibrant and bright and I love the asymmetrical pattern.  It is made of polypropylene but has a "look" about it that doesn't make you think it's synthetic.  So many solids and even very small patterns can go with it because it has so many colors in it!  The only reason I am giving it 4 stars is that perhaps because I ordered the largest size (10'5" x 16'6"), one of the short ends does not lie flat, nor does it appear to be straight even if it would lie flat.  It works out for me because that portion of the edging is hidden under my bed, but if that was not the case, I would be sorely disappointed and would not keep the rug.  In my case however, I am over-the-moon with what it does for my bedroom by adding such color and making it look so much bigger.