Emma Performance 30 Mattress Review
The deepest of Emma's Performance range, and the one that makes sense for heavier sleepers specifically rather than as a general upgrade.
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Verdict
The deepest of Emma's Performance range at 30 centimetres, and the one that makes sense for heavier sleepers specifically rather than as a general upgrade. Depth only helps if you compress far enough to use it.
Buy it if
You are over about sixteen stone, or you share a bed and the combined load is high.
Avoid it if
You are of average or lighter build. You will pay for the bottom third of this mattress and never reach it.
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| Specification | Detail |
|---|---|
| Type | Hybrid |
| Depth | 30cm |
| What the number means | Depth in centimetres, not spring count |
| Position | Deepest in the Performance range |
| Bedding note | Requires deep fitted sheets. Standard UK sheets will not stay on. |
The scores
The right answer for heavier sleepers and an expensive irrelevance for lighter ones.
Only good value if your build actually uses the depth.
Thirty centimetres gives heavier sleepers material to compress into.
A deeper spring layer moves more air.
Deeper construction holds the perimeter better.
Depth and pocketed springs together damp movement well.
200 nights and Emma's returns operation.
What the number means
The numbers are centimetres
Emma's Performance range is numbered by depth: the 26, 28 and 30 are 26, 28 and 30 centimetres deep. They are not spring counts.
That is unusually honest naming for this category, and it is also the whole decision, because on a hybrid extra depth generally means more or taller spring. Check what the extra depth is made of before paying for it.
Why depth matters for heavier sleepers and not for everyone
This is worth explaining properly, because depth is the most misunderstood specification in mattress retail.
A mattress supports you by compressing until the resistance it generates matches your weight. A ten stone sleeper reaches that point within the first few centimetres of comfort layer. An eighteen stone sleeper compresses considerably further.
So the bottom third of a 30 centimetre mattress is doing real work for a heavier sleeper and nothing at all for a lighter one. Deep mattresses are not better, they are built for a different load.
The corollary matters too. A heavier sleeper on a shallow mattress compresses through the comfort layers and reaches the base, which is why shallow mattresses feel hard and wear out quickly for heavier people rather than feeling supportive.
What else to check if you are heavier
Depth is one of three things that matter above about sixteen stone, and it is the one most often discussed alone.
Firmness. A stated 7 out of 10 feels softer to a heavier sleeper, because they compress further before the resistance matches. Go firmer than the rating suggests.
Spring gauge, not just count. A spring supports according to its gauge and height. Very high spring counts are achieved with thinner wire in smaller units, which is the wrong trade for a heavier body. Fewer, stronger springs beat more, weaker ones here.
Edge support. Heavier sleepers load the perimeter harder when sitting on the edge to dress, and unreinforced edges collapse first.
On those three together, Otty's Extra Firm with reinforced side panels and Rem-Fit's 4000 Ortho Elite at 9 out of 10 are the two UK mattresses I would shortlist alongside this one.
A correction worth making
Commonly repeated, and wrong
Mattresses marketed to heavier sleepers are usually sold on depth and spring count, and spring count is frequently the wrong signal for that buyer. Very high counts are achieved by using thinner gauge wire in smaller units, which trades individual spring strength for finer contouring. A heavier body needs stronger springs rather than more of them, so a well-built 2,000 spring mattress at a firm rating will often outperform a 6,000 spring one at a plush rating for that sleeper.
Should you buy it?
Yes if you are heavier, and only then. Thirty centimetres gives you material to compress into and the extra depth is doing real work.
If you are of average build, the Performance 28 is the sensible choice and you will not notice the difference except in the price and the sheets.
Questions people ask
Is a 30cm mattress better than a 26cm one?
Only for a heavier sleeper. A mattress compresses until its resistance matches your weight, so a ten stone sleeper reaches that point in the first few centimetres while an eighteen stone sleeper compresses much further. Deep mattresses are built for a different load, not to a higher standard.
What should a heavier sleeper look for in a mattress?
Three things. Firmness, because a stated 7 out of 10 feels softer to a heavier sleeper. Spring gauge rather than count, because very high counts use thinner wire in smaller units, which is the wrong trade. And edge support, because unreinforced perimeters collapse first.