Original Fine Persian NAIN rug. Handmade Hand-knotted Lamb's Wool and Silk on a Cotton Foundation.Woven by skilled artisans, Persian Nain rugs are highly sought after. They are made with beautiful muted colors, predominantly beige and navy. Light blue, burgundy, and green are used occasionally. They are woven using the Persian knot. Iranian Nains usually have a cotton warp, however, sometimes silk warps are used. The pile is characteristically wool, but weavers may use silk or accent with silk.