Handmade Hand-knotted in fine lambswool. Lamb's Wool on a Cotton Foundation Vegetable Dyed Hand-Spun Wool Rug The Heriz Rug is one of the most sought-after rugs particularly in the USA and England for many years. No other rug so epitomizes the "East Coast Establishment" than the Serapi carpet. This rug has a dense, soft pile, and excellent quality, to ensure that you will enjoy the look and feel of your rug for years to come.