response: Well, I know that the bridle has two parts, the bit going in the horse's mouth and the reins
original_response: Basially it's like a normal bridle but stronger. A bridle  has two parts the bit that goes in the mouth and the reins that attach to the bit.
history: My daughter trains her horse in Dressage - do you know much about that? I know some facts about it. Did you know that dressage is a french term? It is a form of riding that requires high skills It definitely seems fancy to me - she used to do Hunter Jumper but has moved to dressage. Interesting. Have you ever heard the term double bridle? it is a bridle containing 2 bits and 4 reins How is that used?  I have not heard of that - she's the expert.
knowledge: As defined in the ''Oxford English Dictionary'', the ''bridle'' includes both the that holds a bit that goes in the mouth of a horse, and the reins that are attached to the bit.