Hand Knotted Persian Nain rugs are particularly popular, they have a high knot density and the materials consist of wool and silk warp. In addition to the high quality of the material itself the designs and color combinations are simply magnificent for Nain rugs. Most have patterns with medallions in the middle and floral motifs. Silk is used as a highlighting tool in the detail of the design. Nain rugs are clipped short so the design stands out even more than on other rugs.