Sealy Balance Hybrid Memory Mattress
The Sealy Balance Hybrid Memory Mattress pairs 1400 pocket springs with a memory foam comfort layer, which means you get independent, pressure-relieving support underneath and a body-moulding feel on top.
- Memory foam cushions hips & shoulders
- Minimises partner disturbance
- Breathable Tencel keeps it fresh
£799
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The Sealy Balance Hybrid Memory Mattress is rated Medium Firm, a balance that suits most sleepers, although lightweight side sleepers may find it a touch firm. At 29cm deep it has a reassuringly substantial build, and it comes in UK Single through to Super King. It carries the Allergy UK Seal of Approval and is hypoallergenic, a genuine plus if dust mites or allergies trouble your sleep.
Mattress specifications
Firmness
Medium Firm
Type
Hybrid
Depth (cm)
29
Number of Layers
3
Trial Period (nights)
Warranty (years)
5
Price Range
£799 to £1,399
Best Sleeping Position(s)
Back Sleeping
Stomach Sleeping
Combination Sleeping
Certifications
BS 7177, Allergy UK
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
Why should you choose this mattress?
This mattress makes sense if you want the hug of memory foam without the sink-and-stew feeling foam alone can bring. The 1400 pocket springs move independently, so you feel support tailored to your body rather than a single flat surface, and a partner's movement is less likely to disturb you. Tencel fibres in the comfort layers are naturally breathable, which helps offset memory foam's tendency to hold warmth. It's also vegan friendly and made by an NBF-approved manufacturer, so materials and construction have been independently checked. MattressNextDay states a 5-year guarantee and free next day mainland UK delivery, though some addresses may incur a small fee.
Key features & layer details
Memory Foam
Memory foam moulds to the shape of your body, which means pressure points like hips and shoulders get cushioned rather than pushed against. It gives an orthopaedic style of support with a slow, cradling feel.
Tencel® Fibres
These soft, eco-friendly fibres give the surface a silky-smooth feel. They're naturally breathable too, helping the mattress stay fresher and more comfortable through the night.
1400 Pocket Springs
Each of the 1400 springs sits in its own fabric pocket, so they compress independently rather than as one unit. That means better pressure-relieving support where your body needs it, and less motion transfer across the bed.
Layer details from mattressnextday.co.uk product page, September 2026.
Best suited for?
Allergy sufferers
The Allergy UK Seal of Approval and hypoallergenic build mean this mattress is a sensible pick if dust mites or allergies disturb your sleep.
Couples
Each of the 1400 pocket springs sits in its own fabric pocket, so less motion transfers across the bed when your partner moves.
Back sleepers
A Medium Firm feel with memory foam over pocket springs gives cradling comfort while the springs keep support tailored to your body.
Eco-conscious buyers
Tencel fibres in the comfort layers are described as eco-friendly, and the mattress is also vegan friendly and made by an NBF-approved manufacturer.
Heavier sleepers
At 29cm deep with independent pocket springs under the foam, the build feels reassuringly substantial and gives support where your body presses down most.
If you sleep very hot, memory foam can still hold some warmth despite the breathable Tencel fibres, so a foam-free hybrid may suit you better. Lightweight side sleepers might find Medium Firm slightly too solid for their shoulders. And if you dislike the slow, sinking feel of memory foam, look at latex or pure spring options instead.
Save on an earlier or ex-display model
Some retailers still sell the earlier version of this mattress, or ex-display and returned stock at a lower price. These are the sizes where it costs less than the current model's best price.
Sealy Balance Hybrid Memory Mattress
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FAQ's
Is the Sealy Balance Hybrid Memory Mattress firm or soft?
It's rated Medium Firm. That sits in the range most back and combination sleepers get on well with, offering support without feeling rigid, though notably light side sleepers may find it a little firm at the shoulder.
How many springs does the Sealy Balance Hybrid have?
It contains 1400 pocket springs. Each spring sits in its own fabric pocket and moves independently, which means more targeted pressure relief and less disturbance when a partner shifts position.
Does the Sealy Balance Hybrid come with a guarantee?
MattressNextDay states a 5-year guarantee. It's sensible to confirm the guarantee terms with whichever retailer you buy from, as offers can differ between sellers.
Is the Sealy Balance Hybrid good for allergy sufferers?
Yes, it's a strong candidate. It's hypoallergenic and carries the Allergy UK Seal of Approval, so if dust mites or allergies affect your sleep, this is one of its genuine strengths.
How deep is the Sealy Balance Hybrid Memory Mattress?
It's 29cm deep, a substantial build for a hybrid. Deeper mattresses can be trickier to fit with shallow fitted sheets, so check your bedding before it arrives.
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