Nain rugs are constructed using the Persian knot and can be between 300 and 700 knots per inch. The pile is usually very high quality wool, clipped short and silk is most usually used as highlighting for parts of the detailing in the design. Some pieces are made entirely of silk. Nain rugs are often made in the areas surrounding the Nain town, not necessarily the town itself. Nains utilize the Shah Abbas design and make use of flowing design such as flowers and tendrils. Nain is a small town in the centre of Iran, very close to the famous city of Esfahan. Previous to the beginning of the 20th Century, it was well known for producing high quality handmade woollen cloth. However due to a decline in that business the town commissioned weavers from Esfahan to create hand knotted rugs, that link is still obvious when looking at a Nain rug today, but they do exhibit a style of their own, using often highlightings of blue with cream or ivory backgrounds. Depending on fineness the warp and weft will be either silk or cotton. Most usually cotton is employed, with varying levels of ply referred to as "la", with the lower numbers meaning finer quality. Nowadays Nain itself only produces very fine 4 or 6 La quality. Other 9 La and 12 La are produced mostly in Khorasan region i.e. Kashmar, Mashhad. By far the most famous and influential Nain masterweaver is Habibian, and rugs produced from his workshop are among the finest and most sought after carpets in the world.[citation needed] Another famous rug and carpet designers in Nain is Reza Jafari Naini who lives in Nain. He is affected by his own tremendouse thought of the art, to create such carpet and rug designations.in 1998, one of his designs won the first place in machinery carpet exhibition, it had been designed for Farshe Kabire Yazd Co. he has taught many trainers with this great and traditional art in his small workshope which is next to his home in Nain.[citation needed]