Question

In mostly parts of india pure nylon and polyester are not worm why?

Answer 1

The climate of  India is described as hot and humid, hence in most parts of India nylon and polyester clothes are not worn because they have less air spaces in them and they do not absorb sweat.

Hope it is helpful

Answer 2

because India is a hot or warm country so people don't prefer nylon or polyster as it doesn't allow the air to pass through it as cotton can.
hope it may be helpful