A box spring mattress set consists of two components: a box spring mattress and an innerspring mattress. The box spring is often described as the shock absorber of this type of mattress set, as it is designed to bear the brunt of body weight, as well as distribute it evenly. The heart of the innerspring mattress is its system of spring wire coils. During the manufacturing process, coils are tempered with heat or electricity to make sure they quickly return back to their original height after weight is applied and released.
Innerspring mattress coils vary in number, size and height, as well as gauge, which refers to the thickness of the wire used in the coils. These factors affect the overall quality of box spring mattresses. Innerspring mattresses typically have 300 to 800 coils, depending on the size of the mattress. A larger number of coils may seem desirable, but gauge is of utmost importance in determining the bed's firmness and overall durability. Mattresses with 400 coils made with a heavier wire (12.5 gauge) can offset the need for a larger number of coils. It's also helpful to pay attention to how coils are distributed. Certain mattresses may be constructed with coils concentrated in areas that require more support, such as the spine and hips, shoulders and knees.
The average life of a box spring mattress set is five to seven years. When a box spring mattress set begins to feel uncomfortable, replace both the box spring and innerspring mattress at the same time.