What is a mattress ensemble?

The word ensemble when it comes to mattresses and bases is commonly misused. Firstly before defining an ensemble we have to make clear two other definitions.

A bed or a mattress is what sits on top of the base. The mattress sits on top of the base. Some people may loosely term a mattress as just a bed, or some may call an entire bed frame a bed. In this case we are going to just use the word mattress.

A base is the upholstered wooden structure that the mattress sits or for support, some people also call this a foundation. In this case we are going to call a bed base just a base.

Now an ensemble is just a mattress and base or alternatively we call it a set. So an ensemble is a mattress and a base. Many people incorrectly call the base an ensemble and this is incorrect.