The Best Firm Mattresses for a Solid, Supportive Surface

Firm mattresses with woman thinking about purchase.
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Let’s talk about firm mattresses – those sturdy sleeping surfaces that expertly balance plush comfort with serious back support.

Whether you wake up with annoying aches or prefer to rest easy on an ultra-solid bed, there are a few excellent technologies to choose from, like pocket springs and latex foam.


Pocket Sprung Mattresses

Sleepeezee Backcare Luxury 1400 4FT 6 Double Mattress. Firm mattresses.
Pictured: Sleepeezee Backcare Luxury 1400 4FT 6 Double Mattress.

Pocket-sprung mattresses like the Sleepeezee Backcare Luxury 1400 provide exceptional tailored support through hundreds or thousands of fabric-enclosed springs. This advanced spring system offers several benefits:

  • Excellent motion isolation – The independent springs move separately to absorb movement, preventing you from feeling disrupted by a restless sleeping partner.
  • Excellent edge support – Firm coils reinforce the perimeter to allow full use of the mattress surface without sagging when sitting on the edge.
  • Zoned support – Strategically placed firmer and softer springs accommodate different body zones. More robust coils in the centre and upper back provide sturdy spinal alignment, while softer ones by the shoulders and hips cushion pressure points.
  • Conforming comfort – The springs flex slightly, contouring perfectly to the body’s natural curves, keeping the spine aligned.
  • Temperature regulation – Air can flow between the pocketed coils to prevent overheating.
  • Durability – Quality pocket-sprung mattresses retain shape and support for over 10 years.

Open Coil Mattresses

Shire Beds Eco Drift 4FT 6 Double Mattress. Firm mattresses.
Pictured: Shire Beds Eco Drift 4FT 6 Double Mattress.

If you want to save money, open coil mattresses like the Shire Eco Drift can still provide adequate support with a connected wire framework running from head to toe. It’s not as comfy or advanced as pocketed coils, but it does the job without the expense.

  • Cost – They tend to be cheaper than other spring mattress types because of their basic wire framework design. This can fit better within a limited budget.
  • Springiness – The interconnected springs provide noticeable bounce and responsiveness. This creates a nice firmness preferred by some sleepers.
  • Airflow – The open structure allows for good airflow through the mattress, keeping it from getting too hot.
  • Motion transfer – The springs are all connected, so movement transfers more easily across the bed. If this is a significant concern for you, pocket sprung would isolate motion better.
  • Longevity – Open coil mattresses wear down faster than pricier options. But with care, they can still provide many years of solid support before needing replacement.

Pure Foam Mattresses

Giltedge Beds Flex 150 Firm 4FT 6 Double Mattress. Firm mattresses.
Pictured: Giltedge Beds Flex 150 Firm 4FT 6 Double Mattress.
  • Outstanding pressure relief – Foam perfectly cradles the subtle curves of your body without any unforgiving pressure points, allowing muscles to relax fully. Different densities can provide customised comfort for lighter or heavier body types.
  • Excellent motion isolation – Movement doesn’t transfer across the mattress surface without springs. The foam absorbs movement, so you don’t feel a partner tossing and turning.
  • Long lifespan – Quality foam regains its shape quickly after compression. With care, a pure foam mattress can provide over 10 years of consistent comfort and support before experiencing body indentations.
  • Silent – Foam mattresses make no squeaking or noise compared to mattresses with metal springs. 

Firm Mattresses or Medium-Firm?

Firm mattresses are suited to stomach and back sleepers, providing maximum support for the spine’s natural alignment. Their tightly packed springs or dense foam offer reinforced support for broader body frames or those who prefer sleeping “on” vs “in” the bed.

Medium-firm mattresses offer cushioning comfort and support for most sleep positions, with a slight give. They keep the hips and shoulders aligned while preventing sagging, making them preferable for side sleeping and well-suited for combination sleepers who change positions. The gentler surface also allows more effortless movement to shift positions throughout the night.

What About Orthopaedic Mattresses?

Giltedge Beds Kensington 4FT 6 Double Mattress. Firm mattresses.
Pictured: Giltedge Beds Kensington 4FT 6 Double Mattress.

Orthopaedic mattresses like the Giltedge Kensington provide targeted support and alignment for a solid sleep surface for the spine, hips, shoulders, and other areas. They are for those managing pain or mobility issues but beware of marketing claims – “orthopaedic” is not a regulated term, meaning manufacturers can label any mattresses as orthopaedic.

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