Rem-Fit 4000 Ortho Elite Hybrid Super King Mattress
The Rem-Fit 4000 Ortho Elite Hybrid is a firm orthopaedic mattress, rated 9/10 on Rem-Fit's own scale, which means it offers noticeably less give than most hybrids.
- 9/10 firm feel for heavier sleepers
- Helps keep your spine aligned
- 100-night trial & 15-year guarantee
£719.99
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Rem-Fit 4000 Ortho Elite Hybrid Mattress
More available sizes
Mattress details
Mattress
Rem-Fit 4000 Ortho Elite Hybrid Mattress
Size
Firmness
Firm
Construction
Foam
Pocket Spring
Hybrid
Memory Foam
Orthopaedic
Depth (cm)
25
Layers
2
Layer Details
Memory foam
A stability-focused memory foam layer that minimises sink, which means you'll feel cushioned rather than swallowed. It's designed to stop your hips and shoulders dropping out of alignment.
Pocket springs
4000 dual-layer orthopaedic pocket springs with multi-zoned support, so different areas of your body get the right level of push-back. Encapsulated edge support keeps the perimeter usable for sitting and sleeping.
Layer details from rem-fit.co.uk product page, September 2026.
Key benefits
- 90cm of width each: Sharing a UK super king gives each of you 90cm, the width of a UK single, which means a partner's turning has much further to travel before it reaches you.
- 15cm more each than a UK king: The UK super king is the same length as the UK king, so the extra 15cm per person goes into the gap between you.
- Room for night-time visitors: If a child or a large dog climbs in, 180cm of width leaves both adults a usable share instead of a thin strip at the edge.
- Edges you can use: The encapsulated edge support keeps the perimeter usable, which helps on a crowded UK super king where someone usually ends up sleeping right at the side.
- Extra length over smaller sizes: At 200cm long, the UK super king is 10cm longer than the UK double, which suits you if your feet already reach the end of a shorter bed.
- In proportion in a large room: In a period property or a generous master bedroom, a UK king can look slightly small, and we suggest around 3.5m x 3.2m for a UK super king to feel right.
This size suits you if...
You share with a restless partner and want real distance between you, or children and dogs regularly end up in your bed. It also suits you if you want firm, orthopaedic support and your bedroom comfortably clears our suggested 3m x 2.9m.
Consider another size if...
Your bedroom is smaller than our suggested 3m x 2.9m, or you mostly sleep alone. We'd recommend the UK king instead, which needs at least 2.7m x 2.9m.
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FAQ's
Rem-Fit 4000 Ortho Elite UK super king vs UK king: how much extra space do you get?
The UK super king is 30cm wider than the UK king and the same length. For two people sharing, that works out at 90cm each against 75cm each on the UK king, so 15cm more per person. The UK king needs a smaller room, and we suggest at least 2.7m x 2.9m for it.
Will a restless partner still wake me on a Rem-Fit 4000 Ortho Elite super king?
Distance does most of the work here. With 90cm each, a partner who turns over repeatedly is much further away than on a UK double, where each person gets 67.5cm. The 9/10 firmness and stability-focused foam also keep you from sliding towards each other, although a very restless sleeper may still be noticeable at times.
Is a Rem-Fit 4000 Ortho Elite super king good for co-sleeping with children or a dog?
The width helps most here: 180cm leaves the adults a reasonable share when a child or dog arrives in the night. The firm 9/10 surface stays level rather than dipping around whoever lies on it. Bear in mind that a light child may find it quite hard, since the mattress is designed for firmer support.
Is the Rem-Fit 4000 Ortho Elite in a UK super king too big for a loft conversion?
It can be. A 180 x 200cm bed needs the full-height part of the room, so the slope of the ceiling often decides which wall it goes against. Measure the usable floor at standing height, and if you can't clear our suggested 3m x 2.9m, the UK king is the more practical choice.
What should I measure before ordering a Rem-Fit 4000 Ortho Elite super king?
Check how far your bedroom door opens, and whether a 180cm-wide mattress can turn on your landing. Then budget for bedding sized to match, including a 260 x 220cm duvet, which costs more than bedding for smaller sizes. For the room itself, we suggest at least 3m x 2.9m.