Mowgli form The Jungle Book is often depicted in a loincloth. In most cases this is done because our 'modern' (especially the western-) culture does not allow us to see Mowgli nude, in other cases it is more or less correct.
In Tiger! Tiger! for example we read how Mowgli is wearing a cloth (probably a dhoty, or loincloth).
Part from Tiger! Tiger!
For three months after that night Mowgli hardly ever left the village gate, he was so busy learning the ways and customs of men. First he had to wear a cloth round him, which annoyed him horribly; ...
At some drawings the loincloth looks more like a diaper.
Some people believe that Disney's version of Mowgli is hiding a boomerang in his cloth.
Some pictures of Mowgli, every time in different loincloth... (more at "Mowgli Loincloth Colors")
In the Disney movie The Jungle Book 2, Ranjan --Mowgli's little brother-- has a similar problem as Mowgli had in the first Disney version of The Jungle Book. The only difference is that Mowgli's loincloth was held by Bagheera and Ranjan's loincloth was snagged on a branch.
Other names for loincloth and similar clothing;
Some Loincloth sites;