To dream of a mattress, denotes that new duties and responsibilities will shortly be assumed.
To sleep on a new mattress, signifies contentment with present surroundings.
To dream of a mattress factory, denotes that you will be connected in business with thrifty partners and will soon amass wealth.
The meaning of this dream is connected with the condition and/or comfort of the mattress.
If the mattress was comfortable and clean, then it is an omen of good luck.
If not, it is a warning to start saving for the rainy days ahead.