The Types of Innerspring Mattresses

Continuous

• An innerspring mattress with a continuous coil system features rows of coils that are made from one wire and connected to the next row using small spiraled wires known as helicals. In some continuous coil mattresses, the coils are actually formed into a lattice pattern instead of rows because it allows for more coils to be included in the mattress. This style of mattress provides a great deal of support because of the increased number of coils. In addition, the individual coils typically bear less weight than those in other types of innerspring mattresses because the weight can be dispersed over a larger number of springs. As a result, continuous coils mattresses usually retain their shape longer than other styles of mattresses.

Independent Coil

• Also known as a Marshal coil mattress, an independent coil innerspring mattress contains independent springs that are placed in their own fabric-covered pocket. Because of this design, these mattresses conform to your shape and provide significant support. In addition, this is an ideal style of mattress for couples because you will not disturb your partner when getting in and out of bed since each coil moves independently. The individual coils absorb the movement while the other coils remain in place. However, an independent coil mattress may eventually offer less support as individual springs become worn out over the lifetime of the mattress.

Open Coil

• An open coil mattress, also known as a Bonnell or a Knotted Bonnell, is one of the most common types of innerspring mattresses. The coils inside the mattress are shaped like an hourglass and are connected to one another with helicals. These mattresses provide effective support but usually wear down more quickly than other types of innerspring mattresses. When the coils are worn out, the mattress takes on a bowed shape that causes you to roll toward the center while you sleep.

Offset Coil

• Offset coils are similar to open coils but feature squared-off tops and bottoms that are fitted together in a parallel arrangement on the top surface of the mattress. Also known as a Knotted Offset mattress, this style of innerspring mattress is less prone to leaning or sagging as a result. However, it is usually one of the most costly types of innerspring mattress, so it may not be a viable option if you are on a budget.