Sprung Mattresses Explained

In this article we’re going to clear up any confusion surrounding this term and provide more insight into the various types of sprung mattresses out there, so you can continue your search for a good mattress with a greater understanding. 

So, let’s start with a definition:

What is a Sprung Mattress?

A Sprung Mattress is simply a mattress that consists of internal springs, encased in layers of padding and upholstery. These springs are designed to provide support and comfort for the sleeper by evenly distributing their weight across the mattress.

The term usually relates to both Open Coil Mattresses and Pocket Spring Mattresses (and sometimes Micro Springs). But essentially, a sprung mattress is a very loose (and confusing) term for any mattress that contains springs!

Different Types of Sprung Mattress

Now that we’ve established that a sprung mattress is virtually any mattress that contains some type of springs, let’s delve into (and review) the various types of sprung mattresses.

Open Coil Mattresses

Mattresses with open coils are often marketed as the best option for people with bad backs because they offer ‘excellent support’. However, this claim is simply false.

To put it bluntly, open coil mattresses are some of the worst types of sprung mattress you can get.

The main reason for their unpopularity in the mattress-making world is due to their construction. The open coil spring-type uses a single continuous thread of metal that is curled into loops to create a large and bouncy spring. The coils are then woven together to form a matrix that forms the foundation of the mattress and acts as one large spring. This can cause huge transference, so when a sleeper moves the entire mattress moves too, making them a nightmare for couples! They also have zero edge support, and there is no tailoring for body weight.

Open coil springs are generally not as responsive or supportive as other spring types, and these properties can lead to an unsettled sleep experience. As a result, you may find yourself waking up tired and choosing to sleep on the sofa instead! 

It’s worth noting that open coils are sometimes referred to as cage sprung, interconnected spring, bonnell sprung or orthopaedic sprung. So, if you come across any of these terms, stay clear (unless you are after a restless and uncomfortable night’s sleep)!

John Ryan’s Verdict: Thumbs down.

Pocket Spring Mattresses

Contrary to open coils, pocket spring mattresses are the superior choice on the market. At John Ryan, all of our mattresses are designed with pocket springs.

The main difference between pocket springs and open coils lies in the number of springs, with total spring counts in pocket sprung mattresses ranging from a minimum of 600 springs to a maximum of 2000 springs! This makes an incredible difference to the level of comfort and support you receive when you’re sleeping. 

Pocket spring mattresses utilise many individual springs encased in either synthetic or calico materials. Unlike open coil models, each pocket spring works independently, meaning that when one sleeper moves the other springs do not all follow suit! It is this advanced reaction from the pocket springs that allows the mattress to make “micro-adjustments” based on the sleeper’s body shape, sleeping position, and nocturnal movements. The ability to adapt to the individual needs of a sleeper results in a much more comfortable sleep experience. 

This spring type can also be tailored to accommodate your body weight and offers great edge support. 

John Ryan’s Verdict: Thumbs up! 

Read more on the differences between Open Coil And Pocket Spring Mattresses

Micro Spring Mattresses

Micro springs are actually a type of pocket spring and are sometimes referred to as High Density Pocket Springs. Where standard pocket spring mattresses usually contain a maximum of 2000 springs, micro spring/high density mattresses can contain up to 10,000 springs! 

The perceived benefits of this spring type are that micro adjustments are made to the pressure of the mattress as you lie down on it (due to the springs compressing quickly), thus providing a more advanced, progressive comfort.

However, it is not that simple. Increasing the number of springs to this extreme count doesn’t necessarily mean increased comfort and quality. In fact, one of the most frequent issues associated with micro spring mattresses is spring malfunction! Due to their compact size and tight coiling, these springs are more susceptible to quick failure when they’re subjected to pressure. In some cases, micro springs can actually cause a bed to shake when you turn over because of the movement between the layers of springs that are stacked on top of one another. Unfortunately, both of these situations lead to sleep being disrupted.

This is not to say that micro springs are completely useless, but this level of spring density is more suited for mattress base pads and deep handmade mattress toppers, rather than the entire mattress itself. 

John Ryan’s verdict: Okay, but not great!

Learn more about what Micro Spring Mattresses are.

Foam Encapsulated Spring Mattresses (FEPS)

The fina; type of sprung mattress, a Foam Encapsulated Spring is essentially a high-density foam “box” that houses the pocket springs. Unlike conventional pocket spring mattresses, which use a metal perimeter bar for support, foam mattresses utilise the foam “box”.

This type of sprung mattress has a few benefits. Since the springs are encased in their own pockets of fabric, each spring can move independently and respond to individual pressure points, providing personalised support for the individual sleeping on the mattress. They also have good edge support, since the foam encasement provides a high density solid perimeter around the springs. However there are some drawbacks too.

You can expect FEPs to cost significantly more than other spring types due to the high labour costs involved in the production of the encapsulated spring unit. This extra cost may not be worth it. Additionally, foam encapsulated spring mattresses use a lot of synthetic foam within their multiple layers, which causes them to be more heat retentive (not helpful at all if you tend to get too warm in bed!) and also heavier to turn. 

John Ryan’s verdict: Okay, but not great! 

Learn more about Foam Encapsulated Springs. 

What is the Best Sprung Mattress?

As we’ve discussed, there are a variety of sprung mattresses to choose from, each with their own characteristics that claim to provide a better sleep experience. However, the Pocket Spring Mattress is a clear winner in our eyes.

They are a great investment for those who truly value comfort and support. With individual springs that move independently to provide targeted support, these mattresses are ideal for all types of sleepers (back sleepers, side sleepers and stomach sleepers). Additionally, they are well-ventilated and reduce motion transfer, making them a great choice for couples.

Overall, the combination of comfort, support, and durability make pocket spring mattresses the best type of sprung mattress, and you’ll be guaranteed a great quality of sleep if you choose one that suits you!

If you are searching for the right mattress for you, we highly recommend looking at our Origins Range and Artisan Classic Range, as these are all constructed with premium pocket springs retail at an affordable price. 

What are the benefits of a pocket sprung mattress?

We’ve established that a pocket-sprung mattress is far superior to any other mattress. So let’s take a look at the overall benefits of a pocket-sprung mattress over any other type of mattress support.

Reduced pressure points

Individual pocket springs can easily adjust to the shape and weight of your body at night. This helps to evenly distribute pressure and, in turn, can eliminate pressure points leading to a better night’s sleep.

Extra sleep support

As pocket spring works independently, this means that you receive tailored support no matter how you sleep. These independent springs provide support to all areas of the body. Allowing for a highly customized and tailored sleep offering with your mattress.

Fantastic support for side sleepers

Side sleeping is the most common sleep position and pocket springs easily accommodate this. Pocket springs will readily conform to your body’s shape, which helps provide extra support. Especially to the hips and shoulders of side sleepers where the most pressure is felt.

Roll together is a thing of the past

As each spring works independently, there is a drastic reduction roll together. So if one person moves at night the other sleeper isn’t disturbed by the other person moving around. Thus reducing the mattress roll-together effect felt with other spring and support systems.

Fully customisable mattress support

Pocket spring mattresses come in a variety of tensions and sizes so can be fully customised to your exacting sleep needs. No more one size fits all mattresses!

Adjustable firmness level

The number of pocket springs and the wire gauge (thickness) can be adjusted. This means you can choose the exact tension based on your bodyweight, rather than sinking in too deep or finding the mattress support doesn’t move at all.