Innerspring Systems: The Pocketed Coil

Simmons Beautyrest Recharge World Class Tillingham Plush Mattress

Mattress shopping is not easy. I’m not going to tell you that it is, because that would make me a liar. However, mattress shopping doesn’t have to be as difficult if you have the right information and good resources. Today I’ll be discussing one of four different innerspring coil systems, to be followed in succession by posts on the next three.

In short, an innerspring coil system is a layer of metal coils that provide support while you are sleeping. This is the core of the mattress upon which all the padding and comfort layers lie.

Pocketed coils, also known as Marshall coils, are coils that have been individually wrapped in a fabric casing. This is the only type of coil that isn’t wired together, so each coil compresses on its own as pressure is applied. Mattresses with pocketed-coil systems are very good at conforming to the shape of the body and relieving pressure. Also, because they move individually, they are excellent at reducing motion transfer between couples — so if you often wake up to your partner shifting in bed or getting up, a pocketed-coil system will help prevent you from feeling the movement of weight.


This kind of coil system is really good for side-sleepers. A major reason for this is just simple physics: because there’s less surface area of your body in contact with your mattress, you are exerting more pressure on your mattress. If you have a continuous coil or Bonnell coil mattress, you’re going to need a lot more padding on your mattress to soften the amount of pressure that you feel when you sleep. But a pocketed-coil system cradles your body better to relieve that pressure, allowing you to sleep more deeply and more restfully.

The downside to a pocketed-coil mattress is that it does not provide the best support for people who are high above the average weight. This is partly because the coils are so independent — they cannot spread the weight out as well, so they allow body impressions to form more easily than other innerspring systems.

Overall, a pocketed-coil mattress is a great choice if you are looking for excellent pressure relief and motion-transfer reduction. US-Mattress sells over 400 mattresses with this kind of innerspring system, so it’s easy to find a pocketed-coil mattress at a price that fits your budget.

Sleep Well,

The Snooze Guru


  1. […] Essentially, the Bonnell coil is your most basic innerspring system. If you buy a mattress with a low coil gauge (which makes the coil stronger) or a high coil count, you can still get good, lasting support from your mattress. Even if the coil gauge is higher, you can still get a durable mattress if it has a high coil count. A good Bonnell innerspring mattress has a minimum coil count of 500 for adults and 312 for children. It’s important to be very discerning when you’re looking at mattresses with a Bonnell innerspring system to make sure that it meets those standards — otherwise it will probably wear out much sooner than a comparable mattress with a different coil unit. Also, this is not the best choice for light sleepers. Because all the coils are attached, there is a very high transfer of motion — so you will be able to feel it every time your partner moves, shifts, or gets out of bed. If this sounds unappealing to you, you may want to look into pocketed-coil mattresses. […]


  2. […] The ability of each spring to draw on support from the coils around it also makes a continuous coil mattress more durable, since they’re less likely to form body imprints. You’ll find that most mattresses with continuous-coil systems are able to provide great support for least ten years. Plus, continuous coils are less expensive than pocketed-coil systems. […]


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