What do you call those blankets that horses wore in medieval times?

Question

The blankets that provided warmth for the horse but could also serve as an indication to who the rider was.

Answer 1

Its a caparison and is in the colours of the knight and has his crest on it. The word comes from the french. Most of the words for things to do with a knight and his horse are french and even now words like battilion are french and still in use.

Answer 2

It's just called an extended saddle blanket. Take a look at this webpage.