Sealy Claremont King Size Mattress
The Sealy Claremont is a medium-feel memory foam mattress on springs, 27cm deep.
- Medium feel for side & back sleepers
- Helps keep your spine aligned
- Springs add airflow beneath the foam
£729
Get the lowest price we've found
Save with the previous model
Some retailers still sell the earlier version of this mattress for less than the current model's best price.
Sealy Claremont Mattress
More available sizes
Mattress details
Mattress
Sealy Claremont Mattress
Size
Firmness
Medium
Construction
Foam
Memory Foam
Depth (cm)
27
Layers
3
Layer Details
Cover
A knit fabric cover with a smooth quilted surface. It gives a soft first touch before you reach the comfort layers beneath.
Memory foam
MemorySense foam that moulds to your body for targeted comfort and pressure relief. In practice this means less pressure on your hips and shoulders, especially if you sleep on your side.
Spring system
Sealy's PostureTech spring system distributes your weight evenly and provides zoned support. That helps keep your spine aligned and stops heavier areas sinking too deeply.
Layer details from furniturevillage.co.uk product page, September 2026.
Key benefits
- Proper space for two: The UK king is 15cm wider than the UK double, giving each of you 75cm each for two people sharing.
- Less partner disturbance: The MemorySense foam moulds around each sleeper and dampens movement, which means an early alarm on one side travels less across the extra width.
- Length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK single, UK small double and UK double, a real relief if you're nearing six foot.
- Room for a bed-sharing dog: If a dog claims the foot of your bed every night, the UK king's extra width means you're less likely to end up perched on the edge.
- Medium feel that suits shared beds: The medium firmness is a sensible compromise for couples with different sleeping positions, cushioned enough for side sleepers yet supportive for backs.
This size suits you if...
You share the bed every night and have started noticing every turn and elbow on your current UK double, or one of you is tall enough that 190cm mattresses leave feet hanging off the end. It also suits couples on different schedules who want the foam's motion-dampening plus enough width that a 5am start on one side barely registers on the other.
Consider another size if...
Your bedroom is smaller than our suggested minimum of 2.7m x 2.9m, or you sleep alone. We'd recommend the UK double instead, which needs at least 2.6m x 2.8m and still offers generous solo space.
Similar Mattresses in This Price Range
Did you know? On Mattress Unboxed we have over 1,000 different mattresses to suit all types of sleepers. View all mattresses.
FAQ's
Is the Sealy Claremont UK king big enough for two people?
Yes, comfortably for most couples. At 150 x 200cm, the UK king gives 75cm each for two people sharing, and the MemorySense foam layer absorbs movement so you feel less of a restless partner. If one of you spreads out or a pet joins you regularly, that extra width matters every night.
Will a UK king Sealy Claremont fit in my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves enough space to walk around the bed and open drawers. New build master bedrooms can be tighter than they first appear once wardrobes go in, so measure the usable floor space rather than the room itself.
What's the difference between the Sealy Claremont in a double and a king?
The construction is identical: the same MemorySense foam, PostureTech springs and medium feel at 27cm deep. What changes is space. The UK king is 15cm wider and 10cm longer than the UK double, which you feel as more elbow room every night and no toes off the end if you're tall.
Does the Sealy Claremont UK king reduce partner disturbance?
It helps in two ways. Memory foam naturally dampens movement, so when one of you gets up hours before the other, less of that motion carries across the bed. The UK king's width adds a second layer of separation, because you're simply further from the disturbance in the first place.
Should I choose the UK king or UK super king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length, so sizing up buys width only. If children or pets regularly join you, that width is welcome, but we suggest a room of at least 3m x 2.9m for the UK super king. For most couples the UK king is the practical choice.