Conversation so far:
where did the large loose garment known as the 'poncho' originate
The poncho was one of the typical clothes of the Paracas, Pre-Inca Peruvian Culture around 500 B.C., from which originated the earliest to have been discovered so far.
What was the Poncho garment made out of
The poncho was a folded piece of one fabric or two joined together, made out of cotton and alpaca fiber, worn over the head or wrapped around the body.

Question: What other materials were introduced later on
Self-contained rewrite: What other materials were introduced later on to make Ponchos