The bed renews. You do not replace it.
Around year 5, and again around year 10, a new comfort layer goes on for £299. Everything underneath stays. Two Refits over ten years cost less than one cheap mattress bought twice.
Wake up refreshed
for 25 years.
One mattress, made in every size, and the feel settled after you have slept on it rather than guessed at in a showroom. Twinbuild construction: Sevencore below, a comfort layer above.
Complimentary concierge unpacking · Old mattress taken away · 100 nights to change your mind
From £1,999or £83 a month with Klarna
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- 24 months
- 35cm hybrid
- 2,000 pocket springs, housed alone
- Swappable comfort layer
- 25-year Sevencore
Twinbuild
Two parts.
Only one of them wears.
Every other mattress is one sealed unit, so when the surface goes soft the springs go to landfill with it. A Perennial bed is built in two, and the part that wears lifts out.
01
Coolweave cover400gsm. Heat passes through instead of sitting on you
Cover02
Coolcell gel1cm, at the surface where the heat is
1cm03
Comfort foam1.5cm, grade 2030
1.5cm04
Wave-profile foam2.5cm. Air moves when you do
2.5cm05
Nonwoven separator25g. Stops the foams bonding
25g06
Comfort face A5cm, grade 2540. The softer side
5cm07
Comfort face B5cm, grade 2580. The firmer side
5cm08
Nonwoven separator70g. The release surface
70g09
Spring paddingOver the coil tops
Pad10
Sevencore20cm. 2,000 springs, 7 zones, guaranteed 25 years
20cm11
Encased perimeter8cm, 35 density. The edge holds
8cm12
Base paddingUnder the coils
Pad13
Anti-slip baseStays where you put it
BaseSevencore
Your spine is not one weight.
So the bed is not one tension.
2,000 springs in a super king, each sealed in its own pocket so it answers only to the weight above it. Your shoulder does not decide what your hip gets, and nobody turning over at 3am decides anything for you.
Two gauges across 7 bands. The shoulder, hip and leg carry 2.0mm wire because that is where a body lands hardest. Head, back, knee and feet sit on 1.8mm because they do not.
Zone 1Head1.8mm
Zone 2Shoulder2.0mm
Zone 3Back1.8mm
Zone 4Hip2.0mm
Zone 5Knee1.8mm
Zone 6Leg2.0mm
Zone 7Feet1.8mm
The part that comes out
Two faces. Two nights.
One layer.
10cm of comfort in two equal 5cm faces, same density, two hardnesses. Sleep on the 40 and it gives. Turn it to the 80 and it holds you higher. Both last as long as each other.
Why a Perennial bed
Most mattresses live once.
This one comes back.
An annual plant dies at the end of the season and is bought again. A perennial returns from the same root, year after year. The comfort layer is the part that dies back. Sevencore is the root.
A year to get the feel right.
You cannot learn a bed in 4 minutes on a shop floor. Sleep on it, tell us what is wrong, and we build a new comfort layer to your description. With our compliments, for a year, as often as it takes.
Yours did not exist last week.
Nothing is built before you order it. No warehouse, no old stock to move, no last season's tension being sold as this season's. Wound, layered and closed after you chose your size.
It arrives finished.
Carried to the room you choose, unboxed, unrolled onto your bed and positioned. The packaging leaves with the crew. Complimentary with every mattress.
The old one leaves the same day.
Taken away on the same visit and sent for recycling rather than landfill. We carry the cost. Complimentary with every mattress.
What you are paying for
25 years of good mornings.
36p a night
A super king over its 25-year guarantee. A Onni Refit at year 5 and year 10 adds about 7p.
Why not one at a fifth of the price?
Because you will buy it again. A cheap mattress is an annual: one life, then the whole thing goes, springs included. This is built so the part that wears comes off and the part that lasts stays. Over 25 years you buy one bed and two comfort layers.
I cannot try it first.
Neither can anyone, really. Four minutes lying down in a shop tells you nothing about the eighth week. That is why the feel is not fixed when you order: you sleep on it, and for a year we remake the comfort layer until it is right.
I have never heard of you.
Fair. So we made the things that usually stay hidden checkable: every one of the 13 layers, the wire gauges, the densities, the zone map. And 100 nights to send it back, collected from your home, refunded in full.
What if the firmness is wrong?
Turn the layer over. One face is medium, the other medium firm, and they are equal halves rather than a token flip. If neither is yours, tell us how it should feel and we build one to that description.
Will it sag like the last one?
Sagging is the comfort layer, not the springs. On a sealed mattress that means the whole thing is finished. Here the comfort layer is a part, and the 8cm encased perimeter and 25-year Sevencore underneath are not going anywhere.
What happens to my old mattress?
It leaves on the same visit and goes for recycling. Complimentary, and it is why nothing of ours has to end in landfill either.
Is it actually better, or just more expensive?
Ask a simpler question: what happens in year eight? On a sealed mattress, you buy another one. Here you buy a £299 layer. That is the difference, and it is structural rather than a matter of taste.
What arriving looks like
It arrives finished.
Not left in a hallway in a box for you to wrestle upstairs.
Beforehand
A window you agree
We call before we come and arrange a time that suits you. Nothing arrives unannounced.
On the day
Concierged in
To the room you choose, unboxed, unrolled and positioned. The packaging leaves with it.
Same visit
The old one leaves
Taken away and sent for recycling. We carry the cost.
Sizes and prices
Choose your size.
Select your size - price updates for your market. Dimensions always shown in centimetres.
Soft one side, firm the other. Unzip and flip whenever you want a different feel.
Optional. It reaches the person who makes your mattress.
Comfort layer included · Adjust to Desire. A year to get the feel right. · Complimentary Concierge unpacking · 100 nights to return it
Styled by Onni London+
Soft light. Quiet rooms. Hotel-grade depth in real homes - not a showroom aisle.
