Sealy Balance Hybrid Memory Mattress
Mattress
Sealy Balance Hybrid Memory Mattress
Size
Firmness
Construction
Depth (cm)
29
Layers
3
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.
- Made for typical UK bedrooms: We suggest a room of at least 2.6m x 2.8m, which most double bedrooms clear with space to spare for wardrobes and drawers.
- Room for bedside tables on both sides: At 135cm wide, the double usually leaves enough wall either side for a table and lamp each, something a UK king can squeeze out.
- Motion isolation matters more at this width: With 67.5cm each for two people sharing, the 1400 independent pocket springs help a partner's turning go unnoticed rather than travelling across the bed.
- Easy to dress and replace bedding: Double sheets and 200 x 200cm duvets are sold everywhere at every price, useful if you're kitting out a first flat or a guest room.
- A sensible guest room choice: The medium firm feel suits most visiting sleepers, and the hypoallergenic build with the Allergy UK Seal of Approval is reassuring when different guests use the same bed.
This size suits you if...
You share the bed as a couple and your bedroom is a typical UK size, roughly 2.6m x 2.8m or a little more, where a bigger bed would crowd the room. It also fits if you're furnishing a guest room that needs to sleep visiting couples comfortably, or you sleep alone and want space to stretch out, perhaps with a dog or cat claiming a corner.
Consider another size if...
You're a couple with a generous main bedroom and either of you sleeps restlessly, because 67.5cm each is workable rather than roomy. If your room measures at least 2.7m x 2.9m, we'd recommend the UK king instead.
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Is the Sealy Balance Hybrid double big enough for a couple?
Yes, for most. A UK double gives 67.5cm each for two people sharing, and the 1400 pocket springs compress independently, so one person shifting is less likely to wake the other. Two broad-shouldered or restless sleepers may still feel a little close, in which case the UK king is worth a look.
What size room do I need for the Sealy Balance Hybrid in a UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. That allows walking space at the foot and sides, and in most rooms leaves enough wall for bedside tables on both sides. These figures are our own guidance rather than Sealy's.
Should I get the Sealy Balance Hybrid in a double or a king?
It comes down to your room. The UK double is 15cm narrower and 10cm shorter than the UK king, so the double suits rooms where a king would dominate. If you have at least 2.7m x 2.9m and share the bed nightly, the extra width of the UK king is usually money well spent.
How much does the Sealy Balance Hybrid double cost?
Prices change often, so we don't print a fixed figure here. The live table on this page shows what retailers are currently charging for the UK double, updated as they change their prices, which is a more reliable guide than any number written into the text.
What bedding fits the Sealy Balance Hybrid double?
Standard UK double bedding: sheets sized for 135 x 190cm and a 200 x 200cm double duvet. Because the double is the long standing UK standard, bedding is stocked everywhere at every price point, handy if you're spreading a budget across a whole home at once.