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.
- 75cm each for two people sharing: Each of you gets 75cm of width, so a restless partner rolling over stays comfortably on their own side rather than pressing into yours.
- Pocket springs suit different schedules: The 1000 individually pocketed springs respond to movement locally, which means one of you can slip out for an early shift without waking the other.
- Extra length for taller sleepers: At 200cm long, the UK king is 10cm longer than the UK Double, a real difference if one of you is nudging six foot.
- A cooler surface across a wider bed: The Geltex layer lets air move through the sleep surface, so two bodies sharing the bed generate less trapped heat than on traditional foam.
- 5ft x 6ft 6in in imperial terms: If your bed frame or headboard is listed in feet, this size is 5ft x 6ft 6in, which makes matching older furniture straightforward.
This size suits you if...
You share the bed every night and a UK double has started to feel cramped, especially with one of you turning through the night on the medium, slightly springy Geltex surface. Or one partner is around six foot and keeps finding their feet at the edge, since the 200cm length here solves that. It also suits couples whose dog has claimed a permanent spot and takes more than its fair share.
Consider another size if...
Your bedroom can't comfortably give up 2.7m x 2.9m, or you mostly sleep alone. We'd recommend the UK double instead, which needs a smaller footprint at our suggested minimum of 2.6m x 2.8m.
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Is a UK king big enough for a couple on the Sealy Enhance Diamond?
Yes, comfortably for most couples. It gives 75cm of width each for two people sharing, and because the 1000 pocket springs react to each sleeper independently, you feel less of your partner's movement than you would on an open-coil bed. Very broad sleepers, or couples who like a lot of separation, may prefer the UK super king.
Will the UK king version fit my bedroom?
We suggest a room of at least 2.7m x 2.9m for a UK king, which leaves walking space either side and clearance at the foot. Measure with wardrobes and drawers in place rather than the bare room, since a new build master bedroom often shrinks once the furniture goes in. Tighter than that, and the UK double suits better.
How much bigger is the king than the double in this mattress?
The UK king is 15cm wider and 10cm longer than the UK Double. The width is what couples notice, but the length matters too: if one of you is approaching six foot, the 200cm length stops feet hanging off the end, which the 190cm UK double can't offer.
Should we go up to the super king instead?
The UK super king is 30cm wider than the UK king, and the two sizes are the same length. If your room can manage our suggested minimum of 3m x 2.9m and you regularly share with children or a dog, the extra width is genuinely useful. For most couples upgrading from a double, the UK king is the more practical step.
What bed frame does the UK king Sealy Enhance Diamond need?
A standard UK king frame, sized for a 150 x 200cm mattress, or 5ft x 6ft 6in in imperial terms. Check the frame's stated mattress size rather than its overall dimensions, as headboards and footboards add length. EU king frames are a different shape, so a UK king mattress won't sit properly on one.