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What is Open Coil?

Open coil mattresses are also called traditional innerspring mattresses. They have interconnected coils in a metal mesh that provide even support across the mattress surface.

Many open coil systems use hour glass shaped springs in their interconnected systems so that the evenness is distributed from the top to bottom.

Though this system is good at providing even support, there are complaints of aggravated pressure points and discomfort with open coil systems.

Pros: Durable materials and traditional even feel.

Cons: Pressure point discomfort and motion transfer issues.

Material Scores

Overall Score: 8.7/10

Comfort: 8.7/10

Softness: 8.4/10

Heat: 9.5/10

Hypoallergenic: 9.4/10

Odor: 9.4/10

Eco-Conscious: 8.7/10

General Support: 8.9/10

Price Value: 8.4/10

See Our Top Mattress Choices

Additional Open Coil Facts

How It's Made

Open coil systems are manufactured by heating steel, forming it to the right dimensions and then interconnecting the multiple springs (which can be done with a machine). After this step, this system is wrapped in bedding (such as foam, packed cotton or wool).

How it is Used in Bedding

The open coil system makes up the middle and lower layer of the mattress, usually below a comfort layer of cotton, wool, or foam.

Compare Open Coil With These Materials

Pocket Spring

Bonnell Spring

Coil Spring


Reflex Foam

High Density Foam

Egg Crate Foam




Memory Foam


Polyurethane Foam

Pillow Top


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