A mattress in a box (also known as bed in a box) is a mattress that has been compressed in an air-sealed bag. This method helps to facilitate transportation both to your house and inside your house. Upon receiving the mattress, pull out the mattress from its packaging and let it expand. You can use the mattress immediately but it may take any time from a few hours to 7 days for it to settle into its best condition. Mattresses in a box are just as durable as traditional spring mattresses - quality is not compromised when using this method of transportation.