Sealy Posturepedic Elevate Holst Mattress
Mattress
Sealy Posturepedic Elevate Holst Mattress
Size
Firmness
Medium Firm
Construction
Depth (cm)
30
Layers
3
Layer Details
- Cover. A knitted cover treated with ProShield® fibres and SmarTex™, which means a soft sleep surface with a hygiene-focused finish. One point to know: the retailer listing describes it as quilted in one section and knitted in its specification table, so the exact finish is slightly unclear.
- Comfort Layer. Reflex Foam fillings including ComfortCore™, which targets the lower back, and InfiniLux™ foam for long-lasting comfort. In practice, that means cushioning that's a little firmer under your hips than a basic foam layer.
- Support System. AlignSupport Coil Springs, Sealy's Posturepedic support system, designed to align the spine by sensing and responding to your body weight. The springs are twice tempered, a process that helps them hold their resilience for longer.
Layer details from mattressonline.co.uk product page, September 2026.
- Space to sleep on different schedules: With 75cm each for two people sharing, an early riser can slip out without dragging the duvet across a partner still asleep.
- Edge support across the full 150cm: Owner reviews praise the edge support, which means the extra width is all usable rather than a soft border you avoid.
- Extra length for taller sleepers: At 200cm, the UK king is 10cm longer than the UK double, a genuine relief for anyone approaching six foot.
- Support that scales with the size: The AlignSupport springs respond to body weight individually, so two sleepers of different builds each get their own level of support across the wider surface.
- Lower back reinforcement for both of you: The ComfortCore filling targets the lower back, which means each sleeper gets that firmer zone under the hips rather than sharing one central sweet spot.
This size suits you if...
You share the bed every night and a double has started to feel like a negotiation, you or your partner keep different hours and want to come and go without waking the other, or one of you is tall enough that a 190cm mattress leaves feet at the edge. The 200cm length here solves that quietly.
Consider another size if...
Your bedroom falls short of the 2.7m x 2.9m we suggest for a UK king. In that case we'd recommend the UK double instead, which needs at least 2.6m x 2.8m and gives up 15cm of width.
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.
Is the Sealy Elevate Holst UK king big enough for a couple?
Comfortably, for most. The UK king gives two people sharing 75cm each, and across verified owner reviews the edge support is a strong point, so you can use the full 150cm width without feeling perched. If one of you is restless or you regularly share with a pet, the extra room over a double is felt every night.
What room size do I need for the Sealy Elevate Holst in a UK king?
We suggest a bedroom of at least 2.7m x 2.9m for a UK king. That leaves enough clearance to walk round the bed and open drawers. In a new build master that looks generous on the plans, measure again once wardrobes are in place, as fitted furniture eats floor space quickly.
Is the UK king Elevate Holst long enough for a tall sleeper?
At 200cm, the UK king is 10cm longer than the UK double, which matters if either of you is approaching six foot. Feet stop hanging near the edge and pillows stop migrating. Length, rather than width, is often the real reason taller couples size up, and the UK king delivers it without the footprint of a UK super king.
Does a king size Elevate Holst reduce partner disturbance?
The width does most of the work: 75cm each means less accidental contact when one of you turns or gets up early. The AlignSupport springs respond to each sleeper's body weight individually, so a heavier partner settling in shouldn't tilt your side of the mattress. It won't eliminate movement entirely, but the gap between you helps.
Should I choose the UK king or UK super king in this mattress?
The UK king suits most couples: plenty of space without demanding a huge room. The UK super king is 30cm wider, the same length, and needs at least 3m x 2.9m of bedroom. If your room clears that and you share with children or a dog as routine, sizing up is worthwhile; otherwise the UK king is the sensible pick.