More Than Just Height- Choosing the Right Coils for Your 12-Inch Spring Mattress

  • JLH
  • 2024/04/29
  • 35

When selecting a 12-inch spring mattress, height is undoubtedly a crucial consideration. However, it is equally important to delve into the intricacies of the coils that form the very foundation of your sleeping experience. Understanding the various types of coils and their unique characteristics will empower you to make an informed decision that aligns perfectly with your personal comfort preferences and sleep requirements.

Coil Count and Density

The coil count refers to the number of coils present in the mattress, while density signifies the number of coils per square foot. A mattress with a higher coil count and density will typically offer better support, reduce motion transfer, and provide enhanced durability.

Individual Pocket Coils

Individual pocket coils are encased in fabric pockets that isolate them from one another. This design allows each coil to react independently to pressure, minimizing motion transfer and providing targeted support to each sleeper. Pocket coils are ideal for couples who desire a tranquil sleeping environment.

Bonnell Coils

Bonnell coils are traditional spring coils that are hourglass-shaped and connected by a wire framework. They offer a firm, supportive sleep surface and are often found in budget-friendly mattresses. However, their interconnected design may result in more motion transfer than other coil types.

Continuous Coils

Continuous coils are a single, continuous wire that is looped back and forth to create a supportive network. They provide a more conforming sleep surface compared to Bonnell coils but may not offer the same level of support.

Coil Gauge

The coil gauge refers to the thickness of the wire used to make the coils. A lower gauge indicates a thicker wire, resulting in a firmer mattress. A higher gauge denotes a thinner wire, leading to a softer feel.

Tempering and Heat Treatment

Tempering is a process that strengthens the coils and makes them more durable. Heat treatment involves exposing the coils to high temperatures to soften them and increase their flexibility.

Zoned Support

Some mattresses feature zoned support systems that incorporate coils of different densities in specific areas of the mattress. For instance, the coils may be firmer in the lumbar region to provide additional back support while being softer in the shoulder area for pressure relief.


Choosing the right coils for your 12-inch spring mattress is a multi-faceted decision that involves factors such as coil count, density, type, gauge, tempering, and zoning. By understanding these elements and aligning them with your personal needs and preferences, you can ensure a restful night’s sleep on a mattress that offers optimal support, comfort, and longevity.


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