Concierge unpacking included with every mattress · To the room of your choice, packaging taken away

How it is made

Wound, pocketed,
stacked, closed.

Nothing is built before somebody orders it. Every mattress starts as wire on a spool and ends as a roll in a box, and both of those happen after you have chosen your size.

On the line · Springs wound and pocketed

The core

Seven zones,
two wire gauges.

The spring unit is wound from steel wire on the factory floor, then each spring is sealed into its own fabric pocket so it can move without dragging its neighbours with it.

Ours is arranged in seven zones along the length of the bed. Heavier two millimetre wire sits under the hips and shoulders where load concentrates. One point eight millimetre runs everywhere else. That is why the bed holds a spine level rather than letting the heaviest part of a body sink first.

Twenty centimetres of springs, each one working on its own.

Materials

What goes in

Chosen for what they do over a decade, not for what they cost in a year.

Cover

400 gram cool-knit

Knitted rather than laminated, so air moves through the surface instead of being held against it. Zipped the whole way round.

Comfort

Gel-infused memory foam

Twenty eight density, the highest in the build. Gel infusion is what lets it contour without holding heat.

Airflow

Wave-profile foam

Cut into a wave rather than left flat, so channels run through the middle of the comfort stack and warmth has somewhere to go.

Support

Pocket spring steel

Two wire gauges, 1.8 and 2.0 millimetre, wound and pocketed in house. Seven zones along the bed.

Edge

Encased perimeter foam

Thirty five density, seven centimetres, wrapped around the entire spring unit so the edge holds when you sit on it.

Base

Anti-slip underside

Gripped rather than plain, so the mattress stays where it is put on slats or a divan.

On the bench

Assembled by hand

01

The unit is built

Springs are wound, pocketed and joined into a single unit at your size. Not cut down from a larger one - built to the dimensions you ordered.

02

The perimeter is encased

Thirty five density foam is fitted around the whole spring unit, seven centimetres deep, so the edge behaves like the middle.

03

The comfort layer is built separately

Two densities bonded into one ten centimetre layer, medium on one face and medium firm on the other. It is made as its own product, because it has to come out again.

04

The stack is assembled

Gel memory foam, comfort foam and wave-profile foam are laid over the comfort layer, and the whole assembly is placed on the core.

05

The cover is closed

Cool-knit cover fitted, tape edge finished, zip run the full way round so the comfort layer can be reached without tools.

Then it is rolled

Compressed, so it
reaches the room.

A thirty five centimetre mattress does not go up a staircase in one piece. Compression is how it gets there, and it is not how we leave it.

Compression and roll packing

Rolled, boxed, and unrolled again on your bed by the people who deliver it. It reaches most of its height within hours and settles fully over the first night.

Every piece of packaging leaves with them. So does your old mattress.

Onni London+ mattress in a bedroom

The outcome

A bed that becomes yours,
and stays that way.

  • The feelYou do not choose the feel. You discover it.
    Sleep on it for a month. Tell us how it should feel. We make it that way.
  • ArrivingIt arrives finished.
    Concierge unpacking. Room of your choice. Unrolled onto your bed. Your old mattress leaves with the packaging.
  • Twenty five yearsIt stays right for twenty five years.
    The part that softens is replaceable. The part that lasts, lasts.

Choose your size