Memory Foam vs Innerspring Mattress

Memory foam and innerspring (pocket-sprung) mattresses support the body in fundamentally different ways. Memory foam is a solid slab of viscoelastic and support foam that moulds around the sleeper's shape, spreading weight over a larger surface area. An innerspring mattress uses a core of individually pocketed coils that each compress independently under load, giving a springier, more responsive feel.

This comparison sets two memory foam mattresses — the hiimgo Orthopaedic Medium-Firm (£84.99, 18cm) and the Uliyati CertiPUR-US Medium (£114.99, 20cm) — against two innerspring mattresses from Sealy's Steeple Ortho Plus range (£303 and £447), plus the Wilson Beds 3ft Single (£49.49), a spring mattress with a memory foam top layer that illustrates how the two constructions are increasingly combined at the budget end.

The hiimgo mattress is a single 18cm memory foam construction with a knitted, breathable cover, marketed as orthopaedic and medium-firm with a focus on back-pain and pressure relief. The Uliyati mattress is a 20cm memory foam construction, CertiPUR-US certified, with an emphasis on breathability for cooler sleep at a medium firmness.

Both Sealy Steeple Ortho Plus listings use an innerspring (pocket-sprung) core built for firm, orthopaedic-style support, with the £447 version sitting at a higher price point than the £303 version within the same range. The Wilson Beds 3ft Single is a spring mattress core (approx. 6.5in deep) with a memory foam layer on top, giving a soft feel over an innerspring base rather than being a pure example of either category.

Memory foam's main advantage is contouring: it moulds closely around the shoulders, hips and lower back, which is why the hiimgo mattress is marketed specifically for back-pain and pressure relief. Because foam absorbs movement rather than transferring it across the surface, both memory foam options here should limit motion disturbance for couples, though neither listing states an isolation figure directly.

Innerspring mattresses respond differently: each pocketed coil compresses independently, so the surface pushes back rather than sinking in, giving a bouncier, more responsive feel that many sleepers find easier to move and change position on. The Sealy Steeple Ortho Plus listings position this responsiveness alongside firm, orthopaedic-style support rather than deep contouring.

• Memory foam (hiimgo, Uliyati): close body contouring, pressure relief at shoulders and hips, minimal surface movement transfer
• Innerspring (Sealy Steeple Ortho Plus x2): firmer, more responsive surface, easier repositioning, less deep contouring
• Hybrid-feel (Wilson Beds): a memory foam top layer softens the feel of an underlying spring core, aiming for a middle ground

Solid memory foam has a reputation for sleeping warm because it moulds tightly to the body and restricts airflow underneath the sleeper. Both memory foam options here are marketed specifically to counter this: the hiimgo mattress uses a breathable knitted cover, and the Uliyati mattress is described as designed for cool sleep and breathability alongside its CertiPUR-US certification.

Innerspring mattresses generally allow more air to circulate through the coil layer, which is one reason the Sealy Steeple Ortho Plus range and similar pocket-sprung constructions are often chosen by hot sleepers who find solid foam too insulating. The Wilson Beds mattress, with its foam top layer over a spring core, sits between the two in this respect, though no breathability claim is stated for it.

Of the two memory foam mattresses, only the Uliyati is stated as CertiPUR-US certified, meaning its foam has been independently tested for content, emissions and durability standards. The hiimgo mattress is marketed as orthopaedic and medium-firm with a knitted cover but does not cite a foam certification.

Both Sealy Steeple Ortho Plus mattresses are positioned around firm, orthopaedic-style support, which typically suits sleepers who want a supportive, less sink-in surface, including some back-pain sufferers who prefer firmness over contouring. The Wilson Beds 3ft Single is a single-size mattress aimed at a soft feel, and its foam-over-spring construction and £49.49 price point make it a budget option rather than a direct match for either the pure memory foam or pure innerspring products above.

Choose memory foam — the hiimgo Orthopaedic Medium-Firm or Uliyati CertiPUR-US Medium — if pressure relief, back support, and minimal motion transfer matter most, and you want a lower price point. Choose the Sealy Steeple Ortho Plus if you want a firmer, more responsive innerspring feel from a recognised mattress brand and are willing to pay considerably more for it. The Wilson Beds 3ft Single suits a budget single-bed setup where a soft feel matters more than either pure construction.

• Q: Does memory foam always sleep hotter than innerspring? A: Solid foam retains more heat than an open coil structure in general, but both memory foam mattresses here include breathability features specifically aimed at reducing this effect.
• Q: Is a pocket-sprung mattress always firmer than memory foam? A: In this comparison, yes — both Sealy Steeple Ortho Plus listings are positioned as firm, orthopaedic-style support, while both memory foam options sit at medium to medium-firm.
• Q: Can a mattress combine both constructions? A: Yes — the Wilson Beds 3ft Single shows this directly, pairing a memory foam top layer with an underlying spring core to soften the feel of a spring mattress.
• Q: Which is better for couples? A: Memory foam generally isolates motion better, since each side of the mattress absorbs movement rather than transferring it through connected coils, though individually pocketed springs (as in the Sealy range) reduce this gap compared with older spring designs.

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