Firmness
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)
Certifications
Assessed from the specification published by MattressNextDay, captured September 2026, and from regular price comparison across our UK retail partners.
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, the retailer listing it, states a 5-year guarantee and free next day mainland UK delivery, though some addresses may incur a small fee.
Key Features & what's inside
- 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.
Who's it NOT for?
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.
Sealy Balance Hybrid Memory Mattress
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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, the retailer listing this mattress, 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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