Open coil mattress designs remain a common choice for UK buyers seeking affordable, breathable support. This article explains how open coil mattresses work, their pros and cons, and how they compare to pocket sprung and foam options.
- TL;DR: Open coil mattresses use interconnected springs for buoyant support and strong airflow.
- They cost roughly £75–£400 in the UK and often last three to five years.
- Good for budget buyers and sleepers who prefer a firmer, cooler surface; not ideal for couples seeking low motion transfer.
What is an open coil mattress?
Open coil mattresses use a single connected spring unit to support the body.
Definition: an open coil mattress is a mattress built on interconnected steel springs such as Bonnell or offset coils.
Example: these mattresses usually feel bouncy and responsive, and *they promote airflow better than dense foam*.
How are open coil mattresses constructed?
Open coil mattresses start with a wired spring grid covered by foam and fabric layers.
Construction steps include a welded coil base, a stabiliser border, comfort layers, and a final ticking cover.
Tip: higher gauge springs and thicker comfort layers improve durability and comfort.
Common coil types used
Most open coil mattresses use three main spring types: Bonnell, offset, and continuous coils.
Bonnell springs are hourglass shaped and widely used in budget ranges. Offset coils offer better contouring. Continuous coils run in rows and add edge support.
Stat: many traditional models contain around 300 interconnected coils, which helps spread weight evenly.
Benefits and drawbacks of open coil mattresses
Open coil mattresses offer clear benefits but also some trade-offs.
Pros
Open coil mattresses are affordable, breathable, and provide firm support.
*Cost-effectiveness and strong airflow* make them ideal for warm bedrooms. They often come with simple warranties and quick delivery options.
Example: UK-made models can start under £80, offering good value for single beds.
Cons
They transfer motion more than pocket springs and can sag sooner.
Downside: couples often notice partner movement. Lower-quality units may compress in three to five years.
Tip: choose higher spring gauge and thicker comfort layers to reduce sag.
Open coil vs pocket sprung and memory foam
Open coil mattresses differ from pocket sprung and memory foam in support and motion isolation.
Pocket sprung mattresses use individually wrapped coils for targeted contouring and low motion transfer. Memory foam conforms closely and reduces pressure points but traps heat more.
Authority: independent buying guides from Which? recommend testing support and motion transfer when comparing types.
Which is better for support and couples?
For spinal support, a firm open coil can work well, especially for back sleepers.
For couples, pocket sprung or hybrid mattresses typically perform better due to lower motion transfer.
Is open coil technology outdated?
Open coil designs are traditional but remain practical where affordability and breathability matter.
Many modern models add foam layers to improve comfort while keeping the classic spring base.
Cost, lifespan and sagging
Price and durability vary with build quality and usage.
Typical UK price range and value
In the UK, open coil mattresses commonly range from £75 to £400 depending on size and features.
Example: value models from UK manufacturers often include a five-year warranty and free delivery.
See a selection of budget open coil mattresses at Somna Beds for price examples and specs: open coil mattresses.
Why they sag and typical lifespan
Sagging happens from repeated compression of springs and thin comfort layers.
Fact: typical lifespan is three to five years for standard models, longer for higher-end builds.
Tip: rotate the mattress regularly and use a supportive base to slow sagging.
Care, suitability and buying tips
Simple care extends lifespan and improves performance.
Maintenance steps
Rotate the mattress every three months and vacuum the cover occasionally.
Use a slatted base for airflow and avoid bending the mattress when moving.
Are they suitable for couples and orthopaedic needs?
They can suit single sleepers and some orthopaedic needs when firm support is required.
Couples often prefer pocket sprung or hybrid options for reduced motion transfer.
Summary
Open coil mattresses remain a sensible choice for budget-conscious UK buyers who value breathability and firm support. Pick a higher gauge spring, a trusted UK maker, and follow simple maintenance to extend life.
Frequently asked questions
What is an open coil mattress?
An open coil mattress uses interconnected steel springs as its support core.
How long does an open coil mattress last?
Expect about three to five years, depending on build and care.
Are open coil mattresses good for back pain?
They can help when the mattress is firm and supports neutral spinal alignment.
How breathable are they compared to memory foam?
Open coil designs are generally more breathable than dense memory foam.
