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.
- Room to sprawl on your own: The UK small double is 30cm wider than the UK single, which means you can stretch out or change position without an arm hanging off the edge.
- A double bed for a compact room: At 15cm narrower than the UK double, this size can be the difference between a bedroom door that clears the bed frame and one that doesn't.
- Springs that suit occasional sharing: The 1000 pocket springs respond individually, so on the odd night two of you share a guest bed, one person turning over disturbs the other less.
- Cool surface at a solo-friendly width: The Geltex layer lets air circulate across the sleeping surface, useful for a hot sleeper who chose this size specifically to avoid sleeping pressed against anyone.
- Standard 4ft bedding and frames: The small double is an established UK size, so fitted sheets and frames are easy to find, and a standard double duvet covers it comfortably.
This size suits you if...
You sleep alone and have outgrown a single, perhaps a teenager whose room can't spare more floor space, or you're furnishing a guest room where couples stay a few nights a year rather than every night. It also fits a loft conversion or box room where a standard double would leave nowhere to stand, and the medium feel works across most sleeping positions.
Consider another size if...
You share the bed every night, in which case the UK small double will feel tight over time. We'd recommend the UK double instead, which is 15cm wider and the same length; allow at least 2.6m x 2.8m for it.
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Is a small double big enough for the Sealy Enhance Diamond to suit a couple?
For occasional nights, yes. The pocket springs respond to each person individually, so a guest room pairing will manage fine for a short stay. As an every-night bed for two, 120cm of width is snug, and most couples would be happier on the UK double, which is 15cm wider.
What room size do I need for a small double mattress?
We suggest allowing at least 2.4m x 2.8m for the UK small double. That leaves enough space to walk around the bed and open the door comfortably. In a box room or studio, measure before you buy: this size often fits where the UK double, which needs at least 2.6m x 2.8m by our guidance, would not.
How much wider is a small double than a single mattress?
The UK small double is 30cm wider than the UK single, and the two are the same length at 190cm. That extra width is the point of this size: a solo sleeper gets real room to move without stepping up to a full double footprint.
What bedding fits the Sealy Enhance Diamond in a small double?
You'll need small double, or 4ft, fitted sheets to match the 120 x 190cm surface. A standard double duvet works well on top, with a little overhang on each side. Because 4ft is a standard UK size, bedding is widely available rather than a specialist order.
Is the small double a good size for a teenager?
Often, yes. A teenager who has outgrown a single gets 30cm more width to spread out, while the room keeps more floor space than a UK double would allow. The medium feel of this mattress suits most sleeping positions, so it should adapt as their preferences change. Compare the retailers listed on this page for current pricing.