Sealy Posturepedic Elevate Ultra Arden Memory Mattress
Mattress
Sealy Posturepedic Elevate Ultra Arden Memory Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
30
Layers
5
Layer Details
- Knitted cover. A soft knitted cover treated with SmarTex fibres, which draw heat and moisture away while regulating body temperature. It also carries a ProShield treatment to fight allergens, useful if dust or dander tends to set you off.
- InfiniLux foam. A high density foam layer designed for long-lasting comfort, which means it should resist softening and sagging over time. It cushions your body while staying responsive rather than letting you sink.
- MemorySense ComfortCore. A memory foam layer that gives extra support around the curve of your back. In practice, this is where the pressure relief for your back and hips comes from.
- Reflex foam. A soft, flexible foam that supports spinal alignment. It acts as a transition between the memory foam above and the springs below, so you feel supported rather than perched.
- AlignSupport coil springs. Sealy's Posturepedic spring system senses and responds to your body weight to keep the spine aligned. The springs are twice tempered, which means they're heat-treated to hold their responsiveness for longer.
Layer details from mattressonline.co.uk product page, September 2026.
- Room for two: At 135cm across you get 67.5cm each for two people sharing, enough for most couples to settle without constant elbow contact.
- Fits a typical UK bedroom: We suggest allowing at least 2.6m x 2.8m, which most master bedrooms and many second bedrooms can manage with furniture still in place.
- Bedside tables on both sides: The 135cm width usually leaves walking room either side in an average room, so both of you keep a table and a lamp.
- Cooler nights when sharing: Two bodies raise the temperature under one duvet, so the SmarTex knitted cover, which draws heat and moisture away, matters more in this shared size.
- Support that suits sharing: The AlignSupport coil springs respond to each sleeper's body weight, which means a lighter partner isn't forced into the firmness the heavier one creates.
This size suits you if...
You share the bed every night and your room sits around our suggested 2.6m x 2.8m minimum, so a UK king would swallow the floor space. It also works if you're furnishing a first flat or a guest room that needs to host visiting couples, or you sleep alone, perhaps with a dog or cat claiming a corner, and want space to spread out.
Consider another size if...
You or your partner wake easily, since some owners report motion transfer, and extra width would help you sleep further apart. We'd recommend the UK king instead: it's 15cm wider and 10cm longer, and we suggest allowing at least 2.7m x 2.9m for it.
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Is the Sealy Arden in a UK double big enough for a couple?
For most couples, yes. Two people sharing get 67.5cm each, and the medium firm feel keeps you supported rather than rolling towards the middle. Across owner reviews some do report motion transfer between partners, so if one of you is a restless sleeper and the room allows it, the UK king gives you more distance.
What room size do I need for the Sealy Arden UK double?
We suggest at least 2.6m x 2.8m, with around 3m x 3m the comfortable norm. The larger figure is the one to aim for if you want bedside tables on both sides plus a wardrobe and a chest of drawers, which is the usual furniture load in a typical UK master bedroom.
Can one person sleep on the Sealy Arden UK double?
Comfortably. At 4ft 6in x 6ft 3in it gives a solo sleeper generous room to stretch, and if a dog or cat tends to claim a corner of the bed, you'll still have space left over. The medium firm tension suits most solo sleepers, although lightweight side sleepers may find it a little firm.
How much bigger is the UK double than the UK small double in this mattress?
The UK double is 15cm wider than the UK small double, and both are the same length at 190cm. That extra width is the difference between a bed that copes with occasional sharing and one that suits a couple every night, which is why we'd pick the UK double for a guest room hosting visiting couples.
What bedding fits the Sealy Arden UK double?
Standard UK double sheets and a 200 x 200cm double duvet, both stocked everywhere at every price point. One practical note: the Arden is a deep mattress, so choose fitted sheets with a deep enough pocket to stay tucked. Beyond that, this is the easiest size in Britain to dress cheaply.