Pocket Springs – How many do I need?

Pocket Springs – How many do I need?


It can be very confusing when talking about pocket spring counts and mattresses.

The number of springs used in a mattress are based on a king size mattress, so a smaller or bigger mattress will have less or more springs but still be classified as a 1000 or 1200 series.

Make sure the springs are fully heat-treated, as this will prolong the life of the spring.  This is achieved by putting the individual springs in a furnace, taking them up to red heat, then quenching.  This makes sure the spring in the metal is evenly distributed through the steel.

It is normally agreed by the experts that the optimum quantity of pocket springs in a king-size mattress is 1000 to 1200. This is to allow for a suitable size of coil, as well as the correct thickness of steel. If the coil is too small or the metal too thin, then the support and comfort may suffer.  Obviously, the more coils you add the smaller the coil gets and the thinner the steel.  More springs doesn’t mean better comfort!

It has become a fashion with some manufacturers to offer more and more springs in a mattress – 3000, 4000, 5000 – as a way of trying to impress the customer.  This is achieved by adding extra layers or sheets of small diameter mini-springs on the top and bottom of the mattress.  These allow the manufacturer to claim a bigger spring count, however this does little to improve the support of the mattress. On the contrary, the mini-springs can stop the large pocket springs underneath acting independently so reducing the springs ability to take up the shape of the sleeper, which is the main advantage of individual pocket springs.

1000 Spring Count Structure

Our Appledore, Widecombe, Pure Choice and Vegan Choice all contain 1000 heat treated spring units.  Our Budleigh mattress contains 1200.

1500 Spring Count Structure

There are also justified ways of increasing the spring count and with it the support, without effecting the size of the spring. One way is to nestle the springs closer together, to produce a honeycomb structure.  This will allow the manufacturer to increase the spring count from 1200 to 15000 springs, increasing the support but keeping the spring size the same. (See our Dartmouth)

The other way is to use two complete 1000 spring units, one on top of the other, making the mattress deeper but keeping the spring size the same. This means you are using 2000 springs to create a much deeper and luxurious mattress. (See our Topsham)


This Post Has 2 Comments

  1. Looking for VOC- no offgas no chemical mattress…. Yours looks perfect with the Cottonsafe (have seen your video).. I understand it all apart from…… I wanted a mattress WITHOUT METAL SPRINGS! It is said metal springs accentuate EMR radiation from phone masts coming into the bedroom….. Metal reflects (stops) EMF, so the theory is something like the EMF’s will “bounce” into your body while you are sleeping! What is your comments on this.

    1. Thank you for your comment Stephen. There are two types of sprung units used in manufacturing mattresses. Bonnel Sprung units and Pocket Sprung units. Bonnell Sprung mattresses contain a mattress cage is completely constructed using steel wire and all the springs and frame are connected. This type of construction probably gives most concern to those mindful of Electromagnetic Smog, as the large amount of connected steel is seen as a possible aerial picking up surrounding waves. Pocket Sprung mattresses consist of very short pieces of wire enclosed in fabric pockets therefore not connecting with each other and is the only type of metal spring we use here at Cottonsafe® Natural Mattress. This construction means that any possible electromagnetic field picked up by the wire is tiny compared to the Bonnell sprung spring set. Therefore, if you are concerned about the possible effects of Electromagnetic Smog it would be better to go for a Pocket Sprung mattress.

      Here at Cottonsafe® our number one concern is the kilos of toxic chemicals inside UK mattresses. Therefore, from our point of view, the use of Pocket Springs in mattresses allow us to move away from chemically treated foams, whether natural or man-made as well as giving maximum comfort and ventilation. We believe this is significantly more important to your health.

      If you still have concerns, then please look at our beech wooden sprung “Aspiro” mattress range or our spring-free Futomat selection which are felt and fibre based.

      We have a whole blog post on the risks of Electromagnetic Smog which you can read here – https://www.cottonsafenaturalmattress.co.uk/electromagnetic-smog-and-your-mattress/

      I hope that helps to answer your query.

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