Frequently Asked Questions on Innerspring Mattresses


What are Innerspring Mattresses made of?

Innerspring mattresses are made of precisely configured tempered steel (coil springs) and many different qualities of foam (padding), that work together to support weight, limit the stress to pressure points such as hips and shoulders, and comfortably suspend a sleepers body throughout the night.

Should Mattresses be Rotated? How Often?

Some mattresses need to be rotated every week for the first few months and every few months thereafter. Most mattresses have been designed as "no-flip" mattresses, eliminating the need for end-over-end rotation. Please go through the user manual for more information regarding the rotation of mattresses.

What are the types of coils used in an innerspring mattress?

Types of coils Open

  • Coil or Bonnell Coil: This hourglass-shaped wire coil is joined to adjacent coils by small wire spirals called helical. The open coil design provides good support but these coils fatigue more quickly than more technically advanced coil constructions.

  • Offset Coil: This coil construction is similar to the open coil but it has a squared head, which in theory enables the mattress to contour better. Pocket Coil/Independent Coil or Marshal Coils: A pocket or independent coil is a cylindrical spring wrapped in its own fabric pocket. Designed to give the most contour of any support system, each coil works independently which means that you will not feel your partner’s movement that much. 

  • Continuous Coil: In a continuous coil each row of coils is made of a single wire attached to the next row by helicals. This design allows each coil to deflect weight to a great number of springs resulting in less stress on each coil. Mattresses with continuous coils keep their shape longer.

How are coils in an innerspring mattress connected?

Coils are interconnected to adjacent coils by small wire spirals called helicals. If there are too few of these interconnecting wires a mattress can lose its shape more quickly than one that has an adequate amount. Mattresses that sag quickly usually have few helicals. 

Some manufacturers make individually pocketed coils which disperse movement from different sides of the bed because they are not connected. However, in this case, the pocket or independent coils provide the support required by the individual coil instead of the interconnection between coils.Coils are interconnected to adjacent coils by small wire spirals called helicals. If there are too few of these interconnecting wires a mattress can lose its shape more quickly than one that has an adequate amount. Mattresses that sag quickly usually have few helicals. Some manufacturers make individually pocketed coils which disperse movement from different sides of the bed because they are not connected. However, in this case, the pocket or independent coils provide the support required by the individual coil instead of the interconnection between coils.

What is the lifespan of an innerspring mattress?

An average innerspring mattress lasts about 5.5 years. The coil gauge will impact the longevity of an innerspring bed. Low-gauge wire and tempered steel coils last longer than high-gauge wire and coils made of non-tempered steel. Pocketed coil support cores provide the best contour, but don’t last as long as bonnell and offset coils.