Emma Performance 26 Mattress Review UK 2026

A note from James, who actually slept on it

Lead tester · 86kg / 13st 8lb · hot sleeper · back/side combo · former Silentnight QC · not the 104kg tester

Quick verdict for UK buyers

The sensible door into Emma’s 2026 Performance range: improved AirGrid Tech, a 26cm profile, sold as the all-positions bed rather than Elite’s softer side-sleeper feel. We score it 4.3/5 — not 5 — because this is a young model with almost no independent UK lab trail, and because £729 from-price has to beat Elite on a typical sale.

Buy the 26 if you want the new stack without paying for the 30’s deep cradle. Stay on Original Elite if a sale has already dropped that 27cm AirGrid hybrid below Performance money. Do not buy a taller Performance because the box looks more “flagship.” Use the 200-night trial like an adult, not a weekend lie-in.

Bottom line: combination sleeper around James’s 86kg who wants the 2026 grid, wait for a sale. Side sleeper at Sarah’s 62kg who needs a deep hug — look at the 28 or 30. Back sleeper at David’s 104kg who prefers a level surface to the 30’s sink — the 26’s thin foam can be the point. Anyone shopping on magazine trophies — this paperwork is not here yet.

Who the Performance 26 is for

Should you buy the Performance 26?

Why AirGrid Tech is not “cooling foam”

Foam is dense. Dense things trap heat. Gel, graphite, fancy covers — they all start from that problem and try to cheat it. AirGrid cheats differently: a polymer honeycomb with holes. When you lie down the pillars buckle instead of compressing shut, so air still moves. When you roll, it snaps back. That is why it feels floaty, not “stuck in a warm crater.” Performance 26 uses Emma’s improved AirGrid Tech — same family of idea as Original Elite, marketed as the newer revision, not a sticker swap.

Under the grid sit 2cm of the firmer MemoryAdapt and 5cm of SupportBase. That is the 26’s whole personality: AirGrid give at the surface, then a quicker stop than the 28 or 30. Elite next door is 27cm and softer. Do not buy the 26 because the word Performance is on the box.

Emma’s own test on this page is a 72% higher capacity to level temperature spikes versus a full-foam mattress. That is Emma’s figure. It is not an independent measurement, and Which? has not tested this mattress. A polymer grid cannot beat a 13.5 tog duvet in a 22°C room. It can stop the mattress adding to the problem.

Three nights from the test bedroom

North-facing spare room, no AC, UK duvet, the kind of house that hits 24°C in a heatwave and 14°C in April. Not a lab. That is the point. We have weeks on this mattress, not six months.

Who slept on it (including the one who bounced)

Five bodies, one 2cm MemoryAdapt layer. Sarah at 62kg bounced because it would not hug. David at 104kg did not bounce — he reached the core. James at 86kg is the lead, not the heavy tester. Emma Thompson at 71kg is the heat veto. Rachel at 68kg is the physio lens. The cards below keep every quote we already had, with kilograms attached.

The case against the Performance 26

We give it 4.3/5. The missing points are not rounding errors.

1. Price versus Elite on sale. This shops from £729. Original Elite often lands in the mid-£600s on a typical Emma promotion, and that mattress is 1cm taller with a paper trail. If you already like Elite’s AirGrid feel, paying more for a shallower new model is a bad trade. Wait for a Performance sale, or stay on Elite.
2. Thin review record. Independent, Good Housekeeping and Which? have not tested this mattress. Launch blogs are not test results. We have weeks in a UK bedroom, not a year of ownership reports. If you refuse to spend north of £700 without a magazine number, this is the wrong week to buy.
3. The 26 is the least hugging Performance. 2cm MemoryAdapt and 5cm SupportBase is the thin setting. Sarah at 62kg / 9st 11lb wanted more sink. Emma itself points broader-shoulder side sleepers at the 28 or 30. Buying 26 because it is the cheapest Performance, then complaining it does not cradle, is on you — but it is still a reason plenty of people should skip it. The inverse is true at David’s 104kg / 16st 5lb on his back: that same thin foam can be why the bed feels more supportive than a 30. Do not shop height as if more centimetres always mean more support.

Pros and cons

No lab has published on this yet — so here is our data

As of August 2026, neither Which?, Good Housekeeping nor the Independent has published a test of the Performance 26. That is not us being coy about a score we are hiding: the collection is new, and the numbers you see quoted online almost always belong to the Original Elite generation. Those scores do not transfer to a different stack.

So on this model there is nothing to defer to. Below is everything we recorded ourselves — five people, one bedroom, and our published category marks. It is a panel, not a laboratory, and we would rather say that plainly than dress five opinions up as instrumentation.

What each tester scored it

The spread is narrow and the pattern is consistent: everyone found it competent, nobody found it exciting, and the lowest score came from Sarah at 62kg, who wanted more sink than a “balanced” 2cm MemoryAdapt gives. David at 104kg is not the low score — the thin stack worked in his favour on his back. Our published mark of 4.3/5 is dragged down by value (72/100) and durability (70/100) rather than by comfort (85) or cooling (86) — durability is marked conservatively precisely because nobody has run this stack long-term yet.

What is inside: seven layers

Emma’s Performance 26, 28 and 30 share the same layer list. Height is not a different spring count — it is thicker MemoryAdapt and SupportBase. Emma’s FAQ is explicit: improved AirGrid Tech, dual MemoryAdapt, zoned pocket springs; then “2 cm and 5 cm in the Performance 26” for the firmer MemoryAdapt and the SupportBase. That centimetre split is the 26 — the thinnest MemoryAdapt in the family. Sarah at 62kg barely loads it; David at 104kg loads it into the core. The 28 and 30 are the same recipe with more foam, not a better mattress by default.

DeepCalm Comfort is the collection slogan, not a hidden eighth material. Emma says only Performance delivers it, and that taller models activate comfort more deeply under body weight. On a 26 that is a balanced sandwich, not the 30’s maximum envelope.

Firmness: balanced, not Elite-soft

Original Elite is sold as medium-soft (2/5 on Emma’s scale). Performance 26 is not given that same 2/5 badge on the UK product page. Emma calls it balanced cushioning and support, suited to all sleeping positions. I landed around 6/10: more level through the lumbar than Elite, still not a plank. Sarah at 62kg / 9st 11lb wanted more give at the shoulder. David at 104kg / 16st 5lb wanted that quicker stop. The 2cm MemoryAdapt is the reason for both. You get AirGrid give at the surface, then a quicker stop than a 4.5cm Performance 30 stack — less foam plus more mass means David feels the springs sooner.

If a shop assistant only knows Elite’s “cloud with bounce” story, this will feel a notch firmer and a centimetre thinner. If you currently sleep on a budget all-foam, it will still feel springy. Which? has not published a softness score for it yet.

Sleep positions and body weight

Heavier sleepers should not assume 26cm equals more support. The opposite can be true: less MemoryAdapt over the springs means more of your weight reaches the core. That is why David at 104kg / 16st 5lb on his back can like this height while Sarah at 62kg / 9st 11lb on her side does not. Emma did not print a per-side kilogram limit on this page — not 130kg, not any other figure. Use the trial, and look at 28/30 if you are a heavy side sleeper who actually wants more foam, not less.

Body weight is not a vibe. It is how far you travel through the comfort layer before the core holds you. Sarah at 62kg / 9st 11lb often needs a softer top so her shoulder can drop. David at 104kg / 16st 5lb often needs that same top to stop sooner, or his hips make a hammock. James at 86kg / 13st 8lb sits between them — useful as a typical UK male, useless as a stand-in for a 104kg back sleeper. If you are shopping this Emma Performance 26 because a review said “medium-firm,” match the kilogram figure nearest yours, not the brand icon.

Tester	Weight	Fit	What that weight actually did
Sarah Mitchell	62kg / 9st 11lb	Poor	62kg side sleeper on the thinnest MemoryAdapt (2cm). Shoulders never hugged. She would buy the 28 or 30, not this balanced setting.
Rachel Adams	68kg / 10st 10lb	Mixed	68kg mixed positions. Alignment was acceptable on her back and side; she still vetoes it as a first mattress for a dedicated stomach sleeper.
Emma Thompson	71kg / 11st 2lb	Good	71kg hot sleeper. Enough mass to feel a little more contour than Sarah, not enough to punch through. The grid handled heat; no magazine cooling score exists for this model.
James Wright	86kg / 13st 8lb	Good	86kg lead reviewer, back and side. The all-positions fit. He is not a stand-in for David at 104kg.
David Patel	104kg / 16st 5lb	Good	104kg back sleeper. More of his weight reached the springs through 2cm of foam, so the surface felt more level than a 30’s sink. Supportive on his back — still not a stomach-sleeper plank. Foam edge rail beat Elite’s sit-down shrug.

Find yourself on the scale

Use these bands as a first filter, then use the trial. They are how this mattress behaved for our panel, not a medical chart. A 95kg side sleeper is not David, and a 70kg stomach sleeper is not Sarah.

Your weight	Fit on this mattress	Read this first
Under ~70kg, side sleeper	Poor	Sarah at 62kg did not load 2cm of MemoryAdapt. Look at Performance 28 or 30 if you want a cradle.
70–90kg, combination	Good	James’s 86kg band. AirGrid rebound, quicker stop than Elite. Buy on a sale, not against a cheaper Elite.
Around 100kg+, back sleeper	Good	David’s 104kg result: less foam plus more mass means you feel the springs sooner. That can be the feature versus the 30’s sink.
Around 100kg+, side sleeper	Mixed	You will reach the core. If you still want a shoulder crater, you want more foam (28/30), not a thinner comfort stack.
Stomach sleeper, any listed weight	Skip	More level than a 30, not an Original / Lite plank. Rachel would not start you here. Use the trial on something firmer.

This brand does not print a useful per-side kilogram limit on the product page we used. Treat David’s 104kg week as a comfort signal, not a lab certificate, and use the home trial if you are in his weight class.

Sarah at 62kg and David at 104kg are 42kg apart on the same 2cm MemoryAdapt. The lighter partner can feel perched while the heavier partner already feels the springs. That is not a split-firmness mattress. If one of you is a 62kg side sleeper who needs a hug and the other is a 104kg back sleeper who likes this level feel, you are shopping two briefs. Use the 200-night trial as the product. More on matching firmness to body type: firmness by sleep position.

Cooling and breathability

Emma’s cooling story for Performance is passive: open AirGrid Tech, a breathable core, a cool-to-touch cover. On the Performance 26 FAQ Emma cites its own test — a 72% higher capacity to level temperature spikes than a full-foam mattress. I am repeating that as Emma’s claim, with Emma’s asterisk, not as a Which? “Very cold” band and not as a probe reading I did not take. Which? has not, as far as we can see, listed this model.

The physics of an open polymer grid is still the reason to take the claim seriously. Heat can leave through holes in a way it cannot leave a solid memory-foam slab. That is why AirGrid on Original Elite already had a cooling reputation. It is not a licence to paste Elite’s magazine warmth rating onto Performance 26. A 13.5 tog duvet in a 22°C new-build bedroom will still make you warm. See our cooling mattresses guide and bedroom temperature notes if heat is your main problem.

Couples, edges, the boring admin

Motion: I barely noticed a partner get up. Typical hybrid isolation — better than cheap Bonnell, not silent like a thick all-foam. Without a magazine partner-and-children write-up for this model, the 200-night trial is the test if one of you is a light sleeper. Edges: the foam frame around the spring unit is the interesting change. David at 104kg / 16st 5lb sat on it and called it usable, not a hotel rail. I sit to put socks on: it compresses less than Elite, still not a Hypnos. A 62kg / 104kg couple is 42kg apart on the same 2cm MemoryAdapt — Sarah can feel perched while David already feels the springs. Rotate it, do not flip it. Unbox with two people — Emma does not print a kilogram figure, only “significant weight.” 26cm needs extra-deep sheets, not 30cm-pillowcase sheets. Slats ≤7cm. 200 nights, 10-year guarantee, SplitIt if you must. Buy from Emma if you want Emma’s trial.

Unboxing and the first week

It arrives vacuum-rolled, like other Emma hybrids. Emma does not print a kilogram figure on the UK Performance 26 page. It does warn of significant weight and tells you to check the bed frame can take it. Treat unboxing and later rotation as a two-person job. Cut the wrap on the base, not on a carpet you then have to drag it across.

Emma’s recovery window is specific: 24 hours to full expansion, then air the room for up to 72 hours for the new-mattress smell. We followed that before calling firmness. A 26cm target height is a centimetre under Elite; if you measure it at 24cm the afternoon you cut the plastic, you have not finished the test. Springs were quiet in our first week. A light cover tick on night one is usually fabric, not a broken coil.

Wait until it is near full 26cm before fighting extra-deep sheets onto the corners. Judging “too firm” on a half-expanded hybrid is how people waste the trial. We did not sleep on it the afternoon we cut the plastic.

Bed base and sheets

Emma lists slatted frames with gaps no wider than 7cm, box springs, platform beds and even the floor. Wider slats let a pocket-spring core sag between bars. An old hammocked sprung base will rewrite the feel. Because Emma flags the weight, check the frame’s rating before you drop a king on a cheap metal bedstead.

Depth is 26cm — 1cm shallower than Original Elite’s 27cm. Standard 25cm “hotel” fitted sheets will ping off once you add a protector. Buy extra-deep sheets with a 35cm pocket. That is not the same problem as dressing a Performance 30 (30cm of mattress before the protector). You are not in 30cm-pillowcase territory. A protector is sensible during the trial if you do not glue it down. More on UK dimensions: UK mattress sizes.

UK buying details: trial, warranty, delivery

Performance is online-first in the UK. You will not reliably lie on a 26 in a high-street bed shop. The trial is part of the product, not a gimmick. Collection-page bundles change with the promotion — check the live basket.

200 nights vs Nectar’s 365: does the longer trial win?

This is the tab most people have open next to Emma Performance 26. Nectar advertises a full year and a warranty with “forever” in the name. Emma advertises 200 nights and ten years. The terms are not the same thing, so here they are next to each other before the marketing gets to you.

How the small print actually works, across every UK brand: UK mattress trials and returns explained.

UK sizes and prices (August 2026)

Emma’s own site showed the Performance 26 from £729 including VAT on 19 August 2026 — the same from-price as the collection page. Tom’s Guide’s 15 July 2026 launch piece listed RRPs and a then-current summer sale. Emma discounts move constantly. The table is a snapshot, not a promise. Do not pay full RRP.

Prices last checked 19 August 2026. No UK small double confirmed. Some Emma ranges also list EU sizes — measure the frame in centimetres. Original Elite often sells from the mid-£600s on promotion; that is the comparison that decides whether Performance 26 is a new collection or an expensive centimetre. If you buy from a third-party retailer, confirm the trial length matches Emma’s 200 nights.

Comparisons

If you want the whole UK range on one page — including which model we would actually buy — start on which Emma should I buy?. Spend-up vs Elite: Elite vs Performance

Performance 26 vs 28 vs 30

If you are a combination sleeper who does not crave a deep hug, 26 is the Performance that matches the copy. A 62kg side sleeper (Sarah) may still want the 28 or 30. A 104kg back sleeper (David) may prefer the 26’s level feel to the 30’s sink, because 2cm of foam lets more of his mass reach the springs. Paying for 30 because it is the most expensive box in the range is how you buy a taller mattress you do not need. Full write-ups: Performance 28 · Performance 30.

Performance 26 vs Original Elite

Full spend-up call — when to stay on Elite, when this 26 is the door: Emma Elite vs Performance.

Leave Original for Performance 26 if the new stack and the balanced pitch are the point. Stay on Elite if you want the mattress magazines have already argued about, or if Elite’s sale price undercuts £729. Full Elite write-up: Emma Original Elite review.

Performance 26 vs Simba Hybrid Pro

Read the full Simba Hybrid Pro review, or the whole Simba range. How the 200 nights actually work: UK mattress trials and returns explained.

Emma Performance 26 FAQ