Rem-Fit 4000 Ortho Elite Hybrid Small Double 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
£566.99
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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
- Space to spread out alone: The UK small double is 30cm wider than the UK single at the same length, so a solo sleeper can shift position on firm support without hugging the edge.
- Fits a tighter floor plan: The UK small double is 15cm narrower than the UK double, and we suggest a room of at least 2.4m x 2.8m, which leaves more clearance around doors and wardrobes.
- Edges you can actually use: Encapsulated edge support keeps the perimeter firm, which means you get the full 120cm of width to sleep on rather than losing a strip at each side.
- Firm support for growing frames: The 9/10 tension and hip-zoned springs suit back and front sleepers, so a teenager moving up from a single gets structured support instead of a sagging middle.
- Straightforward to dress: At 25cm deep, the mattress takes standard UK small double fitted sheets, and a regular double duvet covers the 4ft width comfortably.
This size suits you if...
You sleep alone and want noticeably more room than a UK single gives you, or your bedroom is at least 2.4m x 2.8m but would feel cramped with a full UK double, and anyone sharing with you only stays for the odd night.
Consider another size if...
You share the bed with a partner every night and both want room to turn over. We'd recommend the UK double instead, which gives 67.5cm each for two sharing; we suggest at least 2.6m x 2.8m for it.
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FAQ's
Is the Rem-Fit 4000 Ortho Elite UK small double a good size for a teenager?
For a teenager who has outgrown a single, yes. The UK small double adds 30cm of width at the same length, so it doesn't eat much more floor. Bear in mind the 9/10 firmness: a slim teenager who sleeps on their side may find it a little hard on the shoulders.
Rem-Fit 4000 Ortho Elite small double or double: which should I buy?
The UK small double is 15cm narrower than the UK double and the same length. If you sleep alone and your room is snug, the UK small double is the better fit, and we suggest at least 2.4m x 2.8m. For nightly sharing, the UK double gives 67.5cm each; we suggest at least 2.6m x 2.8m for it.
Will a Rem-Fit 4000 Ortho Elite UK small double fit in a loft conversion?
Often, yes. Allow at least 2.4m x 2.8m, but measure where you can stand upright rather than wall to wall, because a sloping ceiling can leave no room to get in beside a wider bed. The firm edges help here, since you can sit on the side to get in without it collapsing.
Can two people share a Rem-Fit 4000 Ortho Elite small double in a guest room?
For occasional stays, it works. The firm surface and encapsulated edges mean guests are less likely to roll towards each other or feel the side give way. For couples who would sleep on it every night, the UK double is a more comfortable choice.
Is the Rem-Fit 4000 Ortho Elite small double long enough for tall sleepers?
The UK small double is 190cm long, or 6ft 3in. If you're tall and your feet already reach the end of the bed, the UK king is 10cm longer, although it is also 30cm wider, and we suggest at least 2.7m x 2.9m for the UK king.