Sealy Enhance Diamond Pocket Geltex Mattress
Mattress
Sealy Enhance Diamond Pocket Geltex Mattress
Size
Firmness
Construction
Depth (cm)
28
Layers
3
Layer Details
- Quilted Cover. The cover and fillings are stitched together into a patterned comfort quilt. This gives the surface a soft, slightly cushioned first impression before you reach the layers beneath.
- Geltex Layer. A gel-infused layer that responds to pressure, supporting the areas that need it most and helping to prevent sleep-related aches in the morning. It also works as a breathable surface, letting air circulate freely to encourage natural temperature regulation.
- Pocket Spring Core. The core holds 1000 springs, each mounted in its own fabric pocket. They react to subtle shifts in body position more accurately than traditional spring systems, which means support that adjusts to you rather than the whole bed moving at once.
Layer details from mattressnextday.co.uk product page, September 2026.
- Distance from a restless partner: With 90cm each for two people sharing, most of the tossing and turning happens too far away to wake you.
- Pocket springs matter more at this width: The 1000 individually pocketed springs respond to movement locally, so at super king width a partner's shifting barely reaches your side at all.
- Room for the whole household: Children who appear at 3am, or a large dog who treats the bed as routine, can squeeze in without pushing anyone to the edge.
- Cooler across a bigger surface: The breathable Geltex layer lets air circulate, which means two sharers spread across 180cm are less likely to build up heat between them.
- The right scale for a big room: In a period property or generous master bedroom a UK king can look undersized, whereas the 180cm width fills the space properly.
This size suits you if...
You share the bed every night and want the most sleeping space a standard UK size offers, your partner is genuinely restless and distance matters more to you than any comfort layer, or children and pets regularly join you and everyone still needs their own share of the mattress. Your bedroom should comfortably clear our suggested minimum of 3m x 2.9m.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest for a UK super king, or you sleep alone. We'd recommend the UK king instead, which is 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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Is a super king Sealy Enhance Diamond too big for a normal bedroom?
It can be. We suggest a minimum of 3m x 2.9m for a UK super king, and it feels more comfortable with extra space beyond that. Measure with door swing and wardrobe access in mind before ordering. If your room is tighter, the UK king needs at least 2.7m x 2.9m and may sit better.
How much space does each person get on the super king Sealy Enhance Diamond?
With 90cm each for two people sharing, the UK super king is the roomiest standard option for couples. Combined with the 1000 pocket springs, which respond to movement individually rather than moving the whole bed, it's the size where a restless sleeper causes the least disturbance to the person beside them.
Will the Sealy Enhance Diamond super king get up my stairs?
Pocket spring mattresses don't roll or fold the way some all-foam designs do, and at 180 x 200cm this is a bulky item to manoeuvre. Check your staircase width, any landing turns and the bedroom doorway before ordering, and check the retailer's delivery guidance for tight access, since practices differ.
Is the Sealy Enhance Diamond good for co-sleeping with children in a super king?
The size helps a lot. At 180cm wide there's room for a child to slot in without either adult losing their space, and the pocket springs mean a small body climbing in disturbs less of the surface. The medium feel suits most positions, though the mattress itself is designed around adult sleepers.
How does the super king compare to the king in this mattress?
The UK super king is 30cm wider than the UK king, and the two are the same length. The construction is identical in both, so the choice comes down to space: sharers who value distance, or anyone joined by children or pets, tend to feel the extra width every night. Compare the retailers listed on this page for current pricing.