Sealy Waltham Super King Mattress
The Sealy Waltham is a medium-feel latex mattress, handmade in the UK, with a depth of 29cm.
- Eases pressure without sinking in
- Zoned springs for even support
- Reinforced edges, no roll-off feeling
£999
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Sealy Waltham Mattress
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Mattress details
Mattress
Sealy Waltham Mattress
Size
Firmness
Medium
Construction
Latex
Depth (cm)
29
Layers
4
Layer Details
Cover
A smooth quilted surface in knit fabric. It gives the sleeping surface a soft, finished feel from the first night.
Filling
A latex filling that provides pressure relief with a resilient, bouncy feel. In practice, that means cushioning for your hips and shoulders without the stuck-in sensation some foams create.
Spring System
Sealy's proprietary PostureTech spring system, built for even weight distribution and zoned support. Different areas of the mattress respond differently, so heavier parts of your body get firmer backing.
Edge Support
Sealy's EdgeGuard extends the usable sleeping area and supports durability. You can sit or sleep near the edge without the sides collapsing.
Layer details from furniturevillage.co.uk product page, September 2026.
Key benefits
- 90cm each, every night: Two sharers get 90cm of width apiece, so one of you turning over rarely registers on the other side of the bed.
- Latex bounce helps at this width: The resilient latex surface makes repositioning easy, which means a fidgety sleeper settles faster instead of heaving the whole mattress about.
- EdgeGuard makes the full 180cm usable: Sealy's reinforced sides mean you can sleep right at the perimeter, useful when children or pets push you towards the edge.
- Zoned springs across a wide bed: The PostureTech spring system distributes weight evenly, so two sleepers of different builds each get appropriate support on their own half.
- No turning, which matters at this size: A 180 x 200cm mattress is genuinely awkward to flip, so the Waltham's no-turn design saves you a two-person wrestling match.
This size suits you if...
You share the bed every night and want space to sleep undisturbed, your partner moves around a lot, or children and pets regularly join you and you'd rather everyone still had room. Your bedroom can take it too: we suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable.
Consider another size if...
Your room falls short of the 3m x 2.9m we suggest as a minimum, or you sleep alone. We'd recommend the UK king instead: it's 30cm narrower, the same length, and needs a smaller room at 2.7m x 2.9m.
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FAQ's
Is the Sealy Waltham super king big enough for a family bed?
It's the most realistic size for one. At 180 x 200cm, two adults get 90cm each, so a child climbing in during the night takes space from one side rather than squeezing everyone. Sealy's EdgeGuard edge support helps here too, letting you use the outer inches without the sides giving way.
Will a latex super king mattress reduce partner disturbance?
The width does most of the work: 90cm each means movement on one side is simply further away. Latex is springier than memory foam, so some motion does travel, but across this footprint the effect is small. If your partner is genuinely restless, distance beats any comfort layer, and this is the widest standard UK size.
What room size does the Sealy Waltham super king need?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling right, leaving space for bedside tables and comfortable walkways on both sides. That's our guidance, not Sealy's. In a large master or a period property a UK king can look undersized, and this is the size that fills the space properly.
Is the Sealy Waltham super king hard to get upstairs?
It's a one-piece 180 x 200cm mattress, 29cm deep, so tight landing turns and narrow door swings deserve a measure before you order. Latex hybrids are also on the heavier side as a category. The Waltham isn't sold as zip and link halves, so plan the route rather than assuming it splits.
What bedding fits this size of the Waltham?
Standard super king sheets fit the 180 x 200cm footprint, and a 260 x 220cm duvet is the usual pairing, big enough that two sharers each keep a fair share of the covers. Bedding at this size costs more than king equivalents, which is a running expense to budget for, though the extra sleeping space tends to justify it.