Ergoflex 5G Super King Mattress
The Ergoflex 5G is an all-foam memory foam mattress with a 23cm profile, built around a 9cm layer of HD visco-elastic memory foam, which means it moulds closely to your shape and eases pressure on hips and shoulders.
- Deep, cradling feel for side sleepers
- Airflow layer moves heat away
- 30-night trial & 10-year guarantee
£747
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Ergoflex 5G Mattress
More available sizes
Mattress details
Mattress
Ergoflex 5G Mattress
Size
Firmness
Construction
Foam
Rolled
Memory Foam
Orthopaedic
Depth (cm)
23
Layers
5
Layer Details
Cover
Tencel outer cover - natural and breathable
Top Layer
Micro-fine inner protective cover
Layer 2
True high-density visco-elastic memory foam
Layer 3
Cool-Sleep™ airflow system
Layer 4
High resilience foam base
Key benefits
- 90cm of width each: Two people sharing get 90cm each, so you can stretch out fully without your elbows ever meeting in the middle.
- Distance plus motion absorption: Memory foam already soaks up movement, and at this width a restless partner is also simply further away, which is the combination light sleepers actually need.
- Room for the whole household: If children or a large dog treat your bed as theirs, the super king is the size where everyone still keeps a fair share.
- 30cm more than a UK king: The UK super king is 30cm wider than the UK king at the same length, a difference you notice every single night rather than only on paper.
- Pressure relief across the full width: The 9cm layer of HD visco-elastic memory foam moulds to each sleeper separately, so two very different body shapes can share one mattress comfortably.
This size suits you if...
You share the bed every night and a UK king has started to feel like a compromise, especially if one of you is restless and the other wakes easily. It also makes sense when young children or pets regularly join you, or when you have a large master bedroom where a smaller bed would look and feel undersized.
Consider another size if...
Your bedroom is smaller than the 3m x 2.9m we suggest as a minimum for a UK super king. In that case the UK king would suit you better: it needs at least 2.7m x 2.9m and is the same length.
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FAQ's
Is the Ergoflex 5G super king good for couples with a restless partner?
It's one of the better cases for this size. Memory foam responds slowly and absorbs movement well, so you feel less of a partner's tossing, and the 90cm each of a UK super king adds physical distance on top. If broken sleep from a fidgety partner is your main complaint, this size tackles it from both directions.
Will the Ergoflex 5G super king fit in my bedroom?
The mattress measures 180 x 200cm, and we suggest a room of at least 3m x 2.9m so you can still open drawers and walk around both sides. Measure before you order, and check the route in too: door swings and tight landing turns are where a mattress this size gets stuck.
How much bigger is the super king than the king in the Ergoflex 5G?
The UK super king is 30cm wider than the UK king, and the two are the same length. That extra width is the difference between a comfortable night for two and a genuinely undisturbed one, particularly if children climb in. Room needs differ too: we suggest at least 2.7m x 2.9m for the UK king.
Is the Ergoflex 5G super king big enough to share with children or pets?
This is the size we'd point families towards. With 180cm of width, a child wandering in at 3am or a large dog claiming the foot of the bed still leaves two adults a reasonable share. The memory foam also keeps their wriggling from travelling across to your side.
How do I compare prices on the Ergoflex 5G in a super king?
Use the price table on this page, which is updated as retailers change their prices, so what you see reflects current availability for this size. Larger sizes vary more in price than smaller ones, so it's worth a quick check even if you've already seen the mattress listed elsewhere.