Mattress construction – The basics

This section will make you understand why, in essence, there is absolutely no need to ‘try’ a mattress. In reality, there is a way to produce a perfect mattress for you and everything beneath this level of build quality will be compromised in one way or the other. I know you’re thinking this cannot possibly be the case but bear with me, it really is the case.Artisan Bespoke

Firstly, we will just take a look at what people do when they go out looking for mattresses. Current data shows that most people (80%) try out a mattress in a shop for less than two minutes. You lie on the mattress and decide whether it is comfortable or not. then move on to the next one. This would be fine if you knew exactly what you were looking at, or what you were meant to feel, and obviously if you have trawled through all this site.  There’s a myriad of other factors that obviously up until now, you didn’t know or even realise you had to take into account of when buying a mattress.

What makes a quality mattress?

A suitable mattress for you does not mean it has to the most expensive. You may not need sumptuous layers of what not, and you may not need multi-thousand springs to support you. The point of this section is for you to know what is actually considered to be a ‘well constructed’ mattress and then you will know the tweaks that can be made to make it suitable for you and your budget.

For this part, we are going to theoretically build a decent mattress and then we will dissect it layer by layer and offer the solutions or compromises that will make it suitable for you and your budget. I promise this will all make sense soon.

In making our mattress we are trying to achieve a good balance of gradual support. This means that there has to be a relation or direct correlation between you, the upholstery and the spring unit. When you lay on the mattress the spring unit should have an element of movement that adjusts to your twists and turns. This movement is fractional and you should not even be aware of it but it should be happening behind the scenes if you will. If it is not moving even slightly, there is something in the mattress that is not right either the upholstery layers are too firm for the spring unit or the spring unit is too firm for the upholstery.

Secondly, the upholstery layers have to be balanced with each other. Upholstery is used in just three parts

1. Support
2. Bridge layer
3. Comfort

1. Support

The support layer is the material that is always used directly on top of the spring unit itself. There are numerous support materials from the shocking recycled materials known as poly pads and Saturn pads used in abundance on cheap mattresses, through to bonded wool and cotton etc on high-quality mattresses. This support element is also known as the ‘insulating layer’ insulating the springs from the materials that will eventually go on top.

Calico medium

2.Bridging layer

This section within the mattress is a tricky one to get right. It has to be based on the Goldilocks theory it cannot be firmer than the support layer beneath and cannot be softer than the materials to be placed on top of it. It has to be just right! As with all upholstery for a mattress, there are numerous materials that can be used and, of course, numerous combinations of blends of materials.

White cashmere

3.Comfort layer

This is the easiest aspect of the build, consisting of soft materials. The comfort layer is exactly what it says on the tin. This is the upholstery layer that has to cushion you ‘slightly‘ before the  supportive and cushioning elements of the bridging layer kicks in.

Blended wool and cotton1200

And there we have it! The general thesis of mattress construction in a nutshell. But obviously, there is a lot more to it than that.

Comparing Vi-spring mattress models

By way of real life example and to put this theory into practice we are going to look at a mattress manufactured by Vi-Spring, one of the countries top and most respected manufacturers. They are one of the few manufacturers who list the components they utilise within the mattress by type and by weight (GSM). We have an article here that lists all the relative comparative models in one place.

If we take the example of their Regal Superb a mid-range model within their collection, we will examine how and why this was constructed. We will then look at a similar spec model to see what  elements were changed to make it sit where it does and what differences were made to the construction. Please don’t be put off, this is absolutely fascinating stuff.

As we have said throughout this site, confusion, complication and frustration exist because manufacturers and retailers do not tell you the detail you need to know. If all mattresses were given a descriptive detail as Vi Spring give you, your life would be made so much easier and you would not be in a position of remorse weeks or months down the line. The following examples will show you precisely how valuable and beneficial knowing this detail actually is.

We will be looking in detail at the following Vi Spring models

1. Vi-spring Regal Superb
2. Vi-spring Bedstead Imperial

1. The Vi-spring Regal Superb

[Official Specification: May 2013: Kingsize ]

  • Springs 1.28mm wire springs, 48mm in diameter, sewn in individual calico pockets and hand-formed into a honeycomb nested unit. A total of 1720.
  • Mattress border 23cm deep with three rows of genuine hand side-stitching. Eight horizontal handles on King Size and above. Air vents on all sides. Borders upholstered in protective wool, finished with piped ticking.
  • Mattress upholstery upholstered with 1000 GSM bonded British fleece wool and cotton, then 1200 gsm long-stranded horsetail blended with British fleece wool and enclosed in a hair-proof cambric cover. Overlaid with a layer of 900 GSM blended real Shetland Isle fleece wool and cotton.

The dissection

1. The foundation of the mattress is the spring unit. We can tell by the 1.28mm spring used that this is within the Soft range. It has six active turns and so the flexibility of the single pocketed unit will move and flex under very slight pressure. When all the pockets are combined, the pressure is equalised across the entire unit and so what starts out as a ‘Soft’ individual spring becomes relatively ‘Firmer’ as a whole.

2. On top of this spring unit they place 1000 GSM of bonded wool and cotton, this is a compressed blend of these two components and this part should be stable enough not to flatten or compress whatsoever. But, it should not be so hard as to form a platform on top of the spring units. ‘feeling’ this platform is known ‘a plateau’ and if you feel this when lying on a mattress you will know something is not right within the mattress. Does that make sense as it’s quite difficult to explain?

This part of the mattress is the insulating layer and can be a number of products, but usually, will be a dense product such as the aforementioned BO-WC or a hair pad of sorts.

3. For the support layer, they have used a blend of horsetail and wool weighing in at 1200 GSM. They have identified the wool element as British Fleece wool and coupled with horsetail rather than horsehair you can instantly tell these are premium components used to make the blend. There is no blend ratio which in this particular case it is not necessary to know, however examining the image that is associated with this product you can see the overall colour of this particular upholstery layer is quite dark which indicates to you that a generous layer of the horsetail has been used (this is the most expensive and quality component used within this mattress).

Blends are produced by mixing the two components together to create a new upholstery product and will be weighed out (in this case 1200 GSM) and hand laid across the surface of the underlying Bonded wool cotton. This blend of horsetail and wool will produce a more lofty and softer filling than using a needled product or using Pure Horsetail laid and teased as the bridging support layer.

4. On top of this, they have laid a sheet of cotton calico. This is a natural hair proof membrane that will prevent the individual hairs working their way through the overlying upholstery to eventually pop through the mattress fabric. As a point of note, even though cotton calico or cambric is a hair-proof covering it is not entirely fail-safe. Individual hairs can still have the tendency to work through the calico weave and still be evident on the top of the mattress. This is known as ‘hair migration’, absolutely impossible to prevent fully.

5. The final layer is a very soft and forgiving blended wool and cotton weighing in at 900 GSM. This is usually at a 50/50 ratio. Cotton is not a naturally fire retardant fibre but wool is. However, this mix of wool and cotton produces a fabulously soft and comforting primary layer and the use of this particular blend of upholstery is evident in nearly all high-end mattress models.

6.The mattress fabric (ticking) is then the obvious final layer to complete the mattress.

Summary of Vi-spring Regal Superb

If we study the mechanics of the upholstery used in this particular model we can see that the ‘gradual support’ thesis as outlined above has come to fruition. The springs are the firmest element, followed by the insulator providing a flexible cushion for the springs and a base for the overlying softer element of horsetail and wool. All topped off with a fabulously soft layer of wool and cotton.

When this mattress is tufted, all these components will be compressed further. It has to be realised that prior to adding the mattress ticking the loft of all these loose individual  components will be about 8 inches in height. If a finished mattress is about 23cm in height (which this is) it means that all the upholstery has to be compressed from 8 inches to 3 inches each side. This compression gives the mattress the finished tension.

A point to note here is that although the side panel is specified as 23cm,  after tufting the upholstery will still be higher than the side panel – a very good indicator of a well upholstered mattress. These undulations between the tufts will obviously be prone to further settlement as you sleep on the mattress to eventually level out across the entire surface.

This is where the anomaly of describing a mattress as soft, medium or firm comes into play. Basically, this will explain that it is the user’s weight applied to the mattress that will be the judge of what tension it is, not the mattress. The resultant mattress should be comfortable and supportive for the users weight. If the user is 20 stone then the spring tension will have to be adjusted to a higher gauge ie a 1.58mm or higher, if the user is 11 stone or so, then this mattress with this 1.28mm spring tension will be right.

The next example to explain this is a similar spec model within the Vi-Spring range made for the use with bedsteads. We will be looking at The Bedstead Imperial as within this particular model they utilise a pure Horsehair pad as the support layer and we need to see how this affects the underlying and overlying upholstery.

2. The Vi-spring Bedstead Imperial

[Official Specification: May 2013: Kingsize]

  • Springs 1.28mm wire springs, 48mm in diameter, sewn in individual calico pockets and hand-formed into a honeycomb nested unit.
  • Mattress border 21cm deep with three rows of genuine hand side-stitching. Eight horizontal handles on king size and above. Air vents on all sides. Borders upholstered in protective wool, finished with piped ticking.
  • Mattress upholstery Upholstered with a wool spring protector pad, then 1000 GSM bonded British fleece wool and cotton plus 1200 GSM long-stranded horsehair, enclosed in a hair-proof cambric cover and finally overlaid with 200 GSM bamboo and 1200 GSM blended British fleece wool and cotton. Covered with your choice of finest quality Belgian ticking from the Vi-Spring collection. Hand tufted with felt washers.

The dissection

1. The springs used are exactly the same in this model as they are in The Regal Superb.

2. This has an additional insulating layer of wool and even though there is no associated weight accredited to this product we can easily assume it will be around 500 GSM. This particular mattress is designed for use on a bedstead and the use of the wool spring protector pad is the only additional difference between Vi Springs core range and their Bedstead range. Although I am not 100% sure why this component is added to the models in the bedstead range, I can only assume that it gives the actual springs a greater degree of stability.

3. The insulating layer is added, 1000 GSM bonded wool and cotton. Again this is the same as used in the model above.

4. The support layer is added. This is pure horsehair (not blended) this has a slightly firmer element of tension than the blend but because hair is naturally springy it will be doing the job it is supposed to do quite nicely.

5. The hair proof Cambric sheet is added.

6. A 200 GSM layer of bamboo is added. This is a very soft material and probably used to enhance the blended wool cotton to follow.

7. The final comfort layer of 1200 GSM of blended wool and cotton is added.

Summary of Vi-spring Bedstead Imperial

The difference between these two models is relatively negligible. The combined upholstery weight of the Regal Superb is 3100 GSM and the combined upholstery weight of this Bedstead Imperial is 3600 GSM plus the wool spring protector pad estimated at 500 GSM. This difference of 1000 GSM or so is rather negligible but taking the mattress build as a whole it would seem to me that even though the actual spring gauge is the same, the Bedstead Imperial will be slightly firmer if the same body weight was applied to this as to the Regal Superb.

Comparison of Vi-spring to Artisan Luxury Mattress

This brings me to another point of interest. In our Artisan Luxury, we have a combined upholstery weight of 4600 GSM. A kilo (1000 GSM) more of upholstery per metre than the Imperial Bedstead. So does this make it a ‘better‘ mattress? Not necessarily so. The more upholstery equates to the more overall tension. The Artisan Luxury comes in at a depth of 24cm and so when tufted we have a greater degree of upholstery to be contained within a mattress of similar depth to the models mentioned above.

It stands to reason that for a users bodyweight of say 8 stone, the user would not have enough body mass to take full advantage of the springs under all this mass of upholstery. Conversely, this would be more suitable for body weights of 12 stone plus. However, that does not leave our lightweight user without a particularly good mattress. Vi-Spring produces a wool and cotton mattress (the Coronet) where the bulk of the upholstery is predominately wool and cotton soft Components but constructed with the same gradual support thesis above.

Unlike the use of a superior support element like horsehair used in the top two examples, the support element in the Coronet is much softer – completely acceptable for Mr or Mrs 8 stone, but certainly not suitable for someone much heavier.

Comparison table of Vi spring mattress models

Vi Spring ModelJohn Ryan By Design ModelJohn Ryan Difference
The Regal SuperbArtisan 1500Slightly firmer comfort layer
The Hanbury SuperbArtisan 1500Slightly softer overall
The Regal SuperbArtisan Tailored PocketFirmer support
The Regal SuperbArtisan Naturals
The Bedstead ImperialArtisan NaturalsFirmer support
The Heligan SuperbArtisan Naturals
The Regal SuperbArtisan Bespoke 004Additional 500 GSM
The MelfordArtisan Bespoke 004
The DevonshireArtisan LuxuryUses horsehair & horsetail
The Herald SuperbArtisan Bespoke
The Tiara SuperbArtisan Bespoke 002

Summary

The point to take away from all of this is that although the two examples above describe what it takes to produce a well-crafted mattress it does not follow that they are suitable for everyone. However, a couple of changes to the support elements whether this is springs or the bridging layers can give you an equally good mattress that will be entirely suitable for you.

This is an extremely extensive subject to talk about in just one post and obviously the vast range of mattresses out there can be virtually dissected and discussed. With the actual construction being the basis of all mattresses all types and from all manufacturers, it is not possible to go through each and every one.

The fundamental thesis of this post will, of course, assist you in your  decision as you will now know what aspects of the mattress to take into consideration. This is a very secretive world and it will be no easy task for you to uncover the nitty-gritty of your purchase.  Please let us know what you uncover in your own investigations by adding your thoughts below.

Comments

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  • Elaine says:

    Your website is very informative and helpful! But still I have a question – are there fire retardant additives in any component of your artisan natural mattress or are the fire retardancy requirements fulfilled by the natural materials? I am concerned about the safety of chemical fire retardants.
    Thank you

    Very good question Elaine. All fabric ticking used on all mattresses have to be FR by law. What this retardant is I do not actually know but I now intend to find out – any help would be appreciated. I have also asked my suppliers to find out if any FR additives are used within upholstery. As far as I am aware at this moment there are none. Cotton as an upholstery component does not have any natural FR properties and therefore is used with wool (wool is naturally FR). In days gone by Cotton was treated with Boric Acid as the FR but this treatment is no longer done.

    I am going to do a post about Fire Retardancy and treatments shortly once I have all the info. Incidentally there is a company who monitors and passes chemical additives as safe for human exposure – well worth skimming through the site Oeko Tex Site Here. John and Ryan.

  • Carol says:

    After reading everything on your website about mattresses, I am frustrated that you don’t sell in the United States. Can you maybe lead me to a manufacturer or manufacturers that do something similar to your quality of coil springs/horsetail/hand-tufting in America?


    Hi Carol,
    Vi-Spring is a UK manufacturer of high quality naturally filled pocket spring mattresses, who we believe sell their products in the US. Unfortunately, I am unable to advise where in the US you may be able to find these, but a basic internet search should enable you to locate an outlet. Kind regards Mike.

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