Conversation so far:
What can you tell me about the transport in Gaelic Ireland?
Gaelic Ireland was well furnished with roads and bridges.
What kind of transport did Gaelic Irish society use?
Horses were one of the main means of long-distance transport.
Did Gaelic Irish society use a special kind of horse or equipment?
Although horseshoes and reins were used, the Gaelic Irish did not use saddles, stirrups or spurs.
How did Gaelic Irish people get on and off the horse without a saddle?
Every man was trained to spring from the ground on to the back of his horse.
Did Gaelic Irish society have chariots or wagons as well?
Two-wheeled and four-wheeled chariots were used in Ireland from ancient times, both in private life and in war.

Question: what were the chariots made of?
Self-contained rewrite: What were Gaelic Irish chariots made of?