But Lungi is treated as an inferior garment by many Indians who don't wear.

Perhaps no other Indian attire is as simple, or less cumbersome, as the lungi, which is a garment worn around the waist. The origin of the traditional lungi can be traced to South India, though the dress is now popular among several other communities of Asia also. Lungi is generally woven from cotton and is available in many designs, patterns and colors. However, the most commonly worn are those with checks or the ones in a single dark hue.
http://www.iloveindia.com/indian-clothing/lungi.html

The lungi is a garment worn around the waist in India, Pakistan, Bangladesh, Sri Lanka, Myanmar, Brunei, Indonesia, Malaysia, Singapore, the Horn of Africa and the southern Arabian Peninsula . It is particularly popular in regions where the heat and humidity create an unpleasant climate for trousers.
http://en.wikipedia.org/wiki/Lungi