If you have been shopping for a hybrid mattress, you have probably noticed one feature appearing again and again: pocketed coils. Unlike traditional interconnected springs, pocketed coils are individually wrapped in fabric, allowing each spring to compress more independently.
So, why do hybrid mattresses use pocketed coils? And how do they compare with continuous coils? Here is what to know before choosing a mattress based on its coil system.
What Is a Pocket Coil Mattress?
A pocket coil mattress uses individual steel coils that are enclosed in fabric pockets. The pockets are connected to one another, but the springs themselves are not directly joined by metal wires.
The four primary types of coils used in mattress support cores include Bonnell coils, offset coils, continuous wire coils, and pocketed coils. If you want to learn more about the different mattress coil types, see our guide: What is a coil mattress.
How Do Pocketed Coils Work?
The pocket coil system is a group of small springs that can respond to pressure in different areas of the mattress.
When you lie down, the coils underneath your shoulders, hips, or other heavier areas compress. The surrounding coils do not have to compress to the same degree because each spring can move within its own fabric pocket.
This is different from a continuous coil system, where rows of springs are formed from a single piece of wire and connected together.
Why Do Hybrid Mattresses Use Pocketed Coils?
Hybrid mattresses combine a steel coil support core with comfort layers made from materials such as memory foam, polyfoam, latex, or other cushioning materials. Pocketed coils are popular in hybrids because they help balance several characteristics that can otherwise be difficult to combine.
But are pocketed coils actually better? It depends on what you want from a mattress.
Better Motion Isolation
With a traditional interconnected coil system, pressure applied to one part of the mattress can affect other connected springs. That can make movement travel farther across the sleep surface.
Pocketed coils work differently. As individual springs can compress without directly pulling neighboring springs down with them, movement tends to stay more independent.
This can be useful for couples. If one person changes positions, gets into bed, or gets up during the night, the movement may be less noticeable on the other side of the mattress.
That does not mean a pocket coil mattress will eliminate motion transfer. No mattress completely prevents movement from traveling across the surface. A mattress with springy coils and responsive foam may still have some bounce, particularly when someone moves more forcefully.
More Targeted Support and Contouring
Since the coils can compress independently, the support core can respond differently under different parts of your body. Your shoulders and hips, for example, can sink into the mattress without requiring the entire coil unit to move together.
This can make a pocket coil mattress feel more conforming than a traditional continuous-coil mattress.
The amount of contouring still depends on the layers above the coils, and the coil system should not be viewed alone. Two mattresses can both use pocketed coils and still have noticeably different levels of pressure relief and firmness due to different coil count, gauge, height, etc.
A More Responsive Feel
Foam tends to absorb movement and provide cushioning, while steel coils push back against pressure. The combination can make it easier to change sleeping positions than on a deeply conforming all-foam mattress, which is beneficial for combination sleepers who move a lot.
There is a trade-off, however. A mattress that responds quickly to movement may also feel somewhat bouncy.
Better Airflow
Coils themselves do not retain heat in the same way a large block of dense foam can. They tend to be breathable and can provide a pathway for heat to escape. Hybrid mattresses can therefore have good temperature regulation even when they contain foam comfort layers.
The open structure of a coil support core can allow more air to move through the mattress than a solid foam support core. This can help with temperature regulation, but the coils are only part of the equation. The comfort layers are closer to your body and can have a major influence on how warm or cool a mattress feels.
For example, Sleepmax uses pocketed coils in both its cooling hybrid mattress Podium and pressure relief hybrid mattress OmniFit. The Hive™ Honeycomb Matrix Springs use individually responsive coils arranged in a honeycomb-inspired pattern, combining the independent movement of pocketed coils with the support of a coil-based core. The coils are paired with foam comfort layers to shape the overall feel of each mattress.
What Are the Problems With Pocket Coil Mattresses?
Pocketed coils solve some of the problems associated with traditional interconnected coils, but they are not perfect.
Can Pocketed Coils Sag?
Yes, pocket coil mattresses can eventually develop sagging or loss of support. But it is too simple to blame sagging on the pocketed coil design alone.
A mattress contains multiple layers, and a visible body impression can come from the comfort layers as well as the support core. Coil quality, steel quality, coil gauge, the number of turns in each spring, overall construction, and the foundation underneath the mattress can all matter.
Can Pocketed Coils Be Noisy?
Pocketed coils are generally designed to be quieter than traditional interconnected springs because the individual coils are wrapped in fabric rather than rubbing directly against one another.
But quiet does not mean silent forever. If noise is a major concern, look beyond the coil label and consider the overall construction of the mattress.
Are Pocketed Coils Less Durable?
Not necessarily. Pocketed coils have a more complex construction than continuous coils, which can increase manufacturing cost. But that does not mean every pocket coil mattress will wear out faster.
The durability of a coil system can depend on:
- Steel quality
- Coil gauge
- Coil height
- Number of turns per coil
- Tempering of the steel
- Coil density
- Perimeter reinforcement
- Quality of the materials above the coils
- Foundation or bed-frame support
Are Pocket Coil Mattresses Bouncy?
Yes, they can be. Steel coils naturally have a springy response, so a pocket coil mattress usually feels more responsive than an all-foam mattress.
However, the amount of bounce varies considerably. A hybrid with thicker memory foam may feel more cushioned and less lively. A hybrid with thinner, more responsive foam or latex may feel noticeably springier.
Pocketed coils generally reduce motion transfer compared with interconnected coils, but reducing motion transfer is not the same as removing bounce.
Pocket Coil vs. Continuous Coil: What's the Difference?
Pocketed coils and continuous coils both use steel springs, but they are constructed very differently.
Continuous coils are formed from a single piece of wire into rows of interconnected coils. Pocketed coils use individual springs enclosed in fabric pockets.
| Feature | Pocketed Coils | Continuous Coils |
| Construction | Individual coils wrapped in fabric | Rows of coils formed from continuous wire |
| Coil movement | More independent | More interconnected |
| Motion isolation | Generally better | Generally lower |
| Contouring | More targeted | More limited |
| Responsiveness | Responsive | Firm and responsive |
| Noise | Generally quieter | Can be noisier |
| Cost | Typically more expensive to manufacture | Typically less expensive |
| Common use | Modern hybrids and some innerspring mattresses | Traditional innerspring designs |
Pocketed Coils vs. Continuous Coils: Which Fits Your Sleep Preferences?
Pocketed coils may be more beneficial if you want:
- Better motion isolation for couples
- More targeted support
- More body contouring
- A responsive but less interconnected feel
- A common hybrid mattress construction
- Good airflow through the support core
Continuous coils may make more sense if you prefer:
- A traditional spring feel
- Firm and stable support
- A simpler interconnected coil construction
- A potentially lower-cost mattress design
What Else Should You Pay Attention to?
Coil Gauge
Gauge refers to the thickness of the coil wire.
The numbering can be confusing: a higher gauge generally means thinner wire, while a lower gauge means thicker wire. Thicker coils tend to feel firmer and require more force to compress.
Sleep Foundation notes that mattress coils commonly range from about 12 to 17 gauge, with gauge affecting how easily the coil compresses and how the support core feels.
But gauge should not be judged on its own. A mattress may use coils of different gauges in different areas. For example, a manufacturer may use stronger coils around the perimeter and more flexible coils under the main sleeping area.
Coil Height
Coil height can affect the structure and feel of the support core.
A taller coil system may provide more room for compression, while a shorter system may feel more limited in its range of movement. But, again, taller does not mean better. The height needs to work with the comfort layers above it and the overall mattress profile.
The Bottom Line
Pocketed coils are widely used in hybrid mattresses because they offer a useful middle ground between the responsiveness of springs and the targeted support and motion isolation that many sleepers want.
Each coil is individually wrapped, allowing it to respond more independently to pressure. This can help reduce motion transfer, provide more targeted support, and maintain airflow through the support core. At the same time, pocketed coils can still feel bouncy, and they are not immune to problems such as sagging or noise.
Compared with continuous coils, pocketed coils generally offer more independent movement and contouring, while continuous coils provide a more interconnected and traditional spring feel.
When comparing pocket coil mattresses, do not stop at the coil count. For a queen mattress, 800 to 1,200 pocketed coils is a useful reference range, but coil gauge, coil height, steel quality, comfort layers, and edge support can tell you much more about how the mattress is likely to perform.
FAQ
How Many Pocket Coils Should a Queen Mattress Have?
There is no single coil count that makes a queen mattress good or bad. Sleep Foundation lists roughly 800 to 1,200 coils as a typical range for pocketed coil systems, but coil count alone does not determine support or durability. When comparing mattresses, also look at coil gauge, coil height, steel quality, and the materials above the coils.
Does More Coils Mean a Better Mattress?
No. A higher coil count may mean more individual points of support, but it does not tell you how thick the steel is, how the coils are designed, or how the comfort layers affect the feel.
