Relyon Orthofirm Deluxe 800 Pocket Mattress
Mattress
Relyon Orthofirm Deluxe 800 Pocket Mattress
Size
Firmness
Firm
Construction
Depth (cm)
23
Layers
4
Layer Details
- Damask cover. A finely woven, durable fabric that feels soft to the touch and doesn't retain heat. That means a cooler surface than many synthetic covers, and one built to last.
- Dual density white fibres. This layer offers a comforting embrace while reinforcing the firm feel, which means a little softness at the surface without undermining the support beneath.
- Soft white fibres. Densely packed fibres that support the spring unit and increase the firm feel. In practice, this is what keeps the mattress feeling stable and consistent edge to edge.
- Pocket springs. 800 pocket springs, each in its own fabric pocket, so they move independently. You'll feel more responsive, localised support and less disturbance from a partner's movement.
Layer details from mattressonline.co.uk product page, September 2026.
- 90cm of width each: Two people sharing get 90cm each, which means a partner who turns over frequently can do so without pushing you towards the edge.
- Independent springs across a wide surface: The 800 pocket springs move separately, so movement on one side of a 180cm-wide bed barely registers on the other.
- Room for night-time visitors: When a child or a large dog joins you before dawn, the extra width means everyone still keeps a genuine share of the bed.
- Firm support edge to edge: The densely packed fibre layers keep the feel stable across the full 6ft x 6ft 6in surface, useful when the whole width gets used.
- Slimmer depth helps at this scale: At 22.5cm deep, a mattress this wide stays manageable on stairs and landings, and standard super king fitted sheets go on without a fight.
This size suits you if...
You share the bed every night and one of you is a light sleeper or a restless one, since the combination of independent pocket springs and 90cm of personal width makes disturbance genuinely rare. It also fits if children or pets treat your bed as theirs, or if you have a large master bedroom where a UK king would look and feel undersized.
Consider another size if...
Your bedroom falls short of the 3m x 2.9m we suggest as a minimum for a UK super king. In that case we'd recommend the UK king instead: it's 30cm narrower, the same length, and needs at least 2.7m x 2.9m.
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 a super king too big for the Relyon Orthofirm Deluxe to feel supportive at the edges?
No. The soft white fibre layers are densely packed to support the spring unit, which keeps the firm feel consistent edge to edge, and that matters more at 180cm wide where the outer third of the bed actually gets slept on. Bear in mind it has no side handles, so rotating a mattress this size takes two people.
How much more space does the UK super king give a couple than the UK king?
The UK super king is 30cm wider than the UK king, and both are 200cm long. For two people sharing, that works out at 90cm each rather than 75cm, so 15cm more each. On a firm mattress where you don't sink towards the middle, that extra width is very noticeable.
Will the Relyon Orthofirm Deluxe super king get up a narrow staircase?
It's a sprung mattress, so it can't be rolled or folded, and at 180cm wide the landing turn is usually the pinch point rather than the stairs themselves. Measure your stairwell, door swing and any tight corners before ordering. The slimmer 22.5cm depth helps a little compared with deeper hybrids, but plan for two people carrying it.
Is the UK super king a good choice if children climb in at night?
It's the size we'd point families towards. At 180cm wide there's room for a small visitor without either adult ending up on the edge, and because each of the 800 pocket springs moves independently, a wriggling child disturbs the rest of the bed less than on an open coil mattress.
What room size do I need for this mattress in a super king?
We suggest at least 3m x 2.9m, with around 3.5m x 3.2m feeling comfortable once you add bedside tables and walking space on both sides. If your room is smaller, the UK king version of this mattress needs at least 2.7m x 2.9m and gives up 30cm of width, nothing in length.