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What is a Coil Mattress: The Comprehensive Guide

From the Puffy Editorial Team | 4 min read.
What is a Coil Mattress: The Comprehensive Guide

Coil mattresses are the classic sleep surface, a true bedding icon. Yet, they're often misunderstood, overshadowed by the rise of foam and hybrid options. Let's explore what a coil mattress is, and why it may or may not be your ticket to dreamland.

Table of Contents

What is a Coil Mattress?

A coil mattress, often referred to as an innerspring mattress, is made up of steel coils or springs that serve as the support system. The coils are covered by layers of padding and upholstery to provide comfort.

Types of Coils

  • Continuous Coils: As the name suggests, made from one long wire.
  • Pocketed Coils: Individual coils wrapped in fabric pockets.
  • Offset Coils: Similar to open coils but with a hinged effect.

Can You Use a Coil Mattress on an Adjustable Bed?

One of the most frequently asked questions about coil mattresses is their compatibility with adjustable beds. Generally speaking, coil mattresses aren't as flexible as their foam counterparts, but they are not entirely incompatible.

Factors to Consider

  • Coil Type: Pocketed coils are more adaptable than continuous coils.
  • Firmness Level: Softer coil mattresses may adapt better to the bends of an adjustable base.

What Does Coil Count Mean in a Mattress?

The coil count of a mattress indicates the number of coils in the mattress's support system. Higher coil counts are often associated with more support and comfort but can also increase the price.

How Important is Coil Count? Contrary to popular belief, a higher coil count does not always mean a better mattress. Other factors like coil gauge and the quality of the foam or padding also play a significant role.

What is Coil Density in a Mattress?

Coil density refers to how closely the coils are packed within the mattress. Higher density usually translates into firmer support and durability.

Understanding the Numbers: The density is often expressed in terms of coils per square foot. A higher number indicates a denser mattress, which may be beneficial for those needing additional support.

Is Coil Mattress Good for Back Pain?

One of the biggest selling points for coil mattresses is their reputed benefits for back pain.

The Science Behind It

Coil mattresses can offer more "push-back" compared to foam mattresses, providing better alignment for the spine.

The Personal Factor

However, comfort is subjective, and what works for one person’s back pain may not work for another. Always consult with a medical professional for chronic back issues.

Check out Puffy mattress reviews from real customers and see how we compare with other brands.

What is an Encased Coil Mattress?

Encased coil mattresses, often called pocket coil mattresses, consist of individually wrapped coils. This design minimizes motion transfer and offers better contouring.


  • Reduced Motion Transfer: Ideal for couples.
  • Improved Contouring: Better alignment and pressure relief.


  • Price: Generally more expensive than other types.

What is an Open Coil Mattress?

Open coil mattresses, also known as Bonnell coils, are the traditional coil design where coils are interlinked.


  • Affordable: Typically less expensive than encased coils.
  • Durability: Often more durable, especially for heavier sleepers.


  • Motion Transfer: Not the best for couples.
  • Less Contouring: May not offer the same level of pressure relief.

Final Thoughts

Coil mattresses have come a long way from their traditional, squeaky ancestors. Understanding the nuances - from coil count to coil density - can help you make an informed choice.

Use our store locator to find the closest furniture or mattress store near you and feel the cloudlike comfort of our Puffy Mattress in person.

Whether it’s about accommodating an adjustable bed, tackling back pain, or simply craving a particular "feel," there's likely a coil mattress out there for you.

So, spring into action - pun intended - and find the coil mattress that will make your dreams a little sweeter.

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  • $1,350 In Total Savings
  • Lifetime Warranty
  • 101-Night Sleep Trial
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  • 100% Made in the USA
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