Denim is a sturdy cotton warp-faced twill textile in which the weft passes under two or more warp threads. This twill weaving produces the familiar diagonal ribbing of the denim that distinguishes it from cotton duck. It is a characteristic of most indigo denim that only the warp threads are dyed, whereas the weft threads remain plain white. As a result of the warp-faced twill weaving, one side of the textile then shows the blue warp threads and the other side shows the white weft threads. This is why blue jeans are white on the inside. The indigo dyeing process, in which the core of the warp threads remains white, creates denim's fading characteristics, which are unique compared to every other textile. The denim will usually fade, which is considered desirable by some people. During the process of wear, fading will usually occur on those parts of the article that receive the most stress. In a pair of jeans, these parts include the upper thighs, the ankles, and the areas behind the knees.Most dry denim is made with 100% cotton and comes from several different countries. Denim Fabrics Denim is a strong, durable fabric constructed in a twill weave with indigo and white yarns. The blue/indigo yarns are the lengthwise or “warp†threads (parallel to the selvage). The white yarns run across the fabric width (the weft threads). Denim is traditionally woven with 100%-cotton yarn; it’s blended with polyester, to control shrinkage and wrinkles, and Lycra to add stretch. Today, denim has many faces. It can be printed, striped, brushed, napped and stonewashed, and the indigo. The market for luxury denim with distinct fashion overtures is estimated at Rs 5,000 upwards has already started. Any entrepreneur venture into this field will be successful. Few Indian Major Players are as under • Aarvee Denims & Exports Ltd. • Century Textiles & Inds. Ltd. • Enterprise International Ltd. • Ginni International Ltd. • Jindal Worldwide Ltd. • Mafatlal Denim Ltd. • Mafatlal Industries Ltd. • Malwa Industries Ltd. • Modern Denim Ltd. • Nandan Denim Ltd. • Oswal Woollen Mills Ltd. • Partap Industries Ltd. • R & B Denims Ltd. • Rainbow Denim Ltd. • Raymond Calitri Denim Ltd. • Shri Lakshmi Cotsyn Ltd. • Shyamprakash Spinning Mills Ltd.