Natural · Sleep · Ritual
How a silk duvet is made: the Sensoire process
How a silk duvet is made: the materials, handwork and structural details that shape every Sensoire mulberry silk duvet.
A silk duvet looks quiet and simple: a pale shell, a soft outline and a light layer resting over the body. What determines its feel, evenness and ability to remain well arranged in everyday use lies inside.
Understanding how a silk filled duvet is made means looking beyond the words "silk filled". The raw silk, the way each layer is stretched and laid, the shell fabric, the fixing method and the final inspection all shape the finished duvet.
How is a silk duvet made?
A silk duvet is made by opening double cocoon mulberry silk into long strand floss, stretching each sheet outwards by hand, laying the sheets across one another until the core is even, weighing every core against its size and warmth specification, enclosing it in a shell, fixing it with box quilting or hand tacking, and checking it before it leaves the table. At Sensoire this runs to eight steps, most of them by hand.
In the United States the same product is usually called a silk comforter. The construction described here is identical. See also what mulberry silk is, how momme weight works and the Sensoire silk filled duvet collection.
Our manufacturing partnership
Sensoire works with a long-standing independent manufacturing partner. The factory produces our duvets to Sensoire requirements for materials, construction and finishing. The eight steps below describe the process used for our current silk duvet collection.
| Step | What happens | What is checked |
|---|---|---|
| 01 | Double cocoon mulberry silk is prepared as long strand floss | Fibre continuity, visible foreign matter removed by hand |
| 02 | Each sheet of floss is drawn outwards by hand in several directions | Transparency, thickness, edges and denser patches |
| 03 | Stretched sheets are laid across one another in different directions | Coverage at the corners, perimeter and centre |
| 04 | Every core is weighed on its own | Filling weight against the size and warmth specification |
| 05 | The core is enclosed in an 80s cotton sateen or 22 momme silk shell | Weave, weight, hand and surface of the shell |
| 06 | The silk is fixed by box quilting or hand tacking, then corner ties are added | Fixing points, tie placement and security |
| 07 | A concealed inspection opening of about 15 cm is kept in the shell | That the opening reveals the filling and closes correctly |
| 08 | Seams and overlocked edges are finished, then the duvet is inspected | Finished weight, surface evenness, seams, ties, needle inspection |
01
Starting with double-cocoon, long-strand mulberry silk
Every duvet in the current Sensoire collection is filled with 100% mulberry silk. The filling comes from double cocoons and is prepared as long-strand silk floss.
Long-strand floss is not chopped into short fibres and then poured into a shell. When opened, the fine strands remain connected, creating thin sheets with enough continuity and give for the stretching and layering that follow.
Before laying begins, workers examine the silk and remove visible foreign matter by hand. Only then does it move to the duvet-making table.
02
Stretching each silk layer by hand
Workers gently draw the prepared silk floss outwards in several directions. A smaller sheet gradually opens into a broad, fine layer that approaches the dimensions of the duvet.
This is measured work. Too little stretching can leave an uneven area. Pulling too quickly can disturb the connected fibres. As the layer expands, the worker watches its transparency and thickness, then adjusts the edges and any denser patches by hand.
03
Cross-layering the silk to build an even duvet core
One stretched sheet is not enough to form a complete duvet core. The layers are placed one over another, with neighbouring sheets laid in different directions. This cross-layering helps cover weaker areas in any single direction and supports a more even distribution from the centre to the edges.
Workers keep checking the corners, perimeter and centre as the core grows. If an area looks thin, they adjust the silk at this stage instead of relying on the outer shell to disguise it later.
A fixed layer count is not a useful standalone specification. Different sizes and warmth options call for different filling weights. Our checks focus on how well the silk has been opened, whether coverage is complete and whether the finished weight matches the specification.
04
Weighing and checking each duvet individually
Once the silk has been layered, every duvet core is weighed on its own. The aim is not to make a duvet as heavy as possible. It is to confirm that the filling weight is right for its size and warmth option.
A larger duvet covers more surface area. Using the same amount of filling across every size would change its thickness and feel. Individual weighing gives the maker a clear point of reference before the core moves into its shell.
During this stage, workers also look again for visible foreign matter, localised build-up and gaps around the edges. The core moves forward only after its weight and lay have been checked.
05
Selecting the shell for each mulberry silk duvet
The shell sits directly around the silk core. Its weave and weight affect the first touch, the way the finished duvet drapes and the character of its surface.
Three Sensoire silk duvets use an 80s pure cotton sateen shell. The fabric is finely woven and smooth, with the restrained feel of cotton. The fourth uses a 22 momme shell made from 100% mulberry silk, which has a smoother hand and a more visible lustre.
These options are not presented as a simple hierarchy. They suit different preferences. Cotton sateen feels more understated and crisp. The 22 momme silk shell gives the duvet an all-silk finish.
| 80s pure cotton sateen | 22 momme mulberry silk | |
|---|---|---|
| Fibre | 100% cotton, finely woven sateen | 100% mulberry silk, 22 momme |
| Surface | Smooth and crisp, restrained | Smoother hand, more visible lustre |
| Character | Understated, the feel of cotton against the skin | An all silk duvet, shell and filling both mulberry silk |
| Sensoire models | Three of the four, including the white piping duvet | One, the duvet with pure silk shell |
06
Choosing the fixing structure and adding corner ties
Once the layered silk is enclosed, the silk filled duvet needs a fixing structure suited to its design. The current Sensoire collection uses two methods.
Box quilting
Our box-quilted model is stitched into defined sections. The quilting helps keep the filling arranged within those areas and gives the duvet a clean, structured surface.
Hand tacking
The other three models are hand tacked. Compared with continuous quilting lines, this method leaves more of the duvet surface uninterrupted while fixing the silk core at selected points.
Neither construction is treated as universally better. Box quilting offers a clearly divided structure. Hand tacking preserves broader areas of continuous surface. The choice belongs to the design of each duvet.
Corner ties
Every duvet also has ties at each corner. When fastened to the inner ties of a duvet cover, they help the duvet remain neatly aligned inside it and reduce movement between the two layers.
In colder weather, the same ties can help connect and align multiple compatible duvets when they are used together. The ties manage the relationship between the duvet and its cover, or between layered duvets. The quilting or hand tacking stabilises the silk within each individual duvet.
| Box quilting | Hand tacking | |
|---|---|---|
| How the silk is held | Stitched into defined sections across the duvet | Fixed at selected points by hand |
| Surface | Clearly divided, structured | Broader areas left uninterrupted |
| Suited to | Readers who want the filling kept within visible sections | Readers who prefer a quieter, less divided surface |
| Sensoire models | One, the box quilted duvet | Three, including the black piping duvet |
07
Keeping a 15 cm silk inspection opening
All four Sensoire silk duvets have a concealed inspection opening measuring approximately 15 cm. It allows you to open a small section of the shell and see the colour, strands and arrangement of the silk inside without taking the duvet apart.
To inspect the filling, look at and lightly touch only the silk nearest the opening. Avoid pulling strands out, as this can disturb the local structure of the core.
The opening is a practical detail. It makes the filling visible rather than asking the label to speak for it.
08
Sewing, overlocking, needle inspection and final checks
After the fixing structure is complete, workers finish the seams and overlocked edges, then examine the joins, corners, piping and outer surface. Each duvet also undergoes needle inspection and a final product check.
- The finished weight matches the relevant specification.
- The surface is even, with no obvious displacement of the filling.
- Seams, overlocked edges and fixing points are complete.
- The corner ties are secure.
- The approximately 15 cm inspection opening opens and closes correctly.
- The shell surface is clean.
Only after these checks is a Sensoire silk filled duvet considered finished.
After the final inspection
The work beneath the shell
For Sensoire, a mulberry silk duvet is not a contest to accumulate the largest set of claims. We pay attention to whether the material matches its description, whether the long strands have been properly opened, whether the layers are even, whether every duvet has been weighed and checked, and whether its construction suits the product.
Most of this work disappears beneath a pale shell. You may not see it at first glance, but it shapes the duvet's hand, outline and behaviour in use.
This is how Sensoire approaches a silk duvet as a sleep brand: begin with honest materials, respect the work and allow each completed step to speak more clearly than an exaggerated promise.
Common questions
How a silk duvet is made: your questions
Is a silk duvet made by hand or by machine?
Both, at different stages. The silk is opened, stretched and cross layered by hand, and the hand tacked models are fixed by hand. Sewing, overlocking and needle inspection are done with machines. The parts that decide how even the filling is are the hand stages.
What is long strand silk and why does it matter?
Long strand silk floss is not chopped into short fibres before it is put into a shell. When it is opened, the fine strands stay connected, so they can be drawn into broad sheets that hold together. Short fibre filling cannot be stretched and cross layered in the same way.
What is double cocoon silk?
A double cocoon is spun by two silkworms together, which leaves the filaments tangled rather than reelable into thread. That makes it unsuitable for weaving but well suited to duvet filling, where it is opened into floss instead of unwound.
How many layers of silk are in a silk duvet?
There is no single correct number, and a layer count on its own tells you little. Different sizes and warmth options need different filling weights. What matters is whether the silk has been properly opened, whether coverage is complete from centre to edge, and whether the finished weight matches the specification for that size.
How can I check the silk filling inside a duvet?
Every Sensoire silk duvet keeps a concealed opening of about 15 cm in the shell. Open it and look at the colour, strands and arrangement of the silk nearest the opening, touching it lightly. Do not pull strands out, as that disturbs the local structure of the core. Related reading: how to tell if silk is real.
Box quilted or hand tacked: which is better?
Neither is better in general. Box quilting stitches the duvet into defined sections and gives a structured surface. Hand tacking fixes the core at selected points and leaves broader areas of the surface uninterrupted. The choice belongs to the design of each duvet, not to a ranking.
Should the shell be cotton sateen or silk?
The shell changes the first touch and the drape rather than the warmth. An 80s pure cotton sateen shell feels crisp and understated. A 22 momme mulberry silk shell has a smoother hand and a more visible lustre, and makes the duvet all silk inside and out. Three Sensoire duvets use cotton sateen and one uses the silk shell.
Is a silk comforter the same as a silk duvet?
Yes. Silk comforter is the usual term in the United States and silk duvet in the United Kingdom and Europe. Silk quilt is used in some markets as well. All three describe a shell filled with mulberry silk floss, made in the way described above.
What are the corner ties for?
They fasten to the inner ties of a duvet cover so the duvet stays aligned inside it and moves less against the cover. In colder weather the same ties can connect and align compatible duvets used together. The quilting or hand tacking stabilises the silk within one duvet, while the ties manage the relationship between layers.
How should a silk duvet be cared for once it is made?
A silk filled duvet is not washed like a pillowcase. Keep it in a cover, air it rather than laundering it, and treat marks locally. The full routine is set out in the silk duvet care guide.
The collection
Explore Sensoire silk filled duvets
Choose between box quilting and hand tacking, or between an 80s cotton sateen shell and a 22 momme mulberry silk shell.
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Box-Quilted Long-Strand Mulberry Silk Filled Duvet
Box quilted · 80s pure cotton sateen shell
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Mulberry Silk Duvet with White Piping
Hand tacked · 80s pure cotton sateen shell
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Mulberry Silk Duvet with Pure Silk Shell
Hand tacked · 22 momme, 100% mulberry silk shell
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Mulberry Silk Filled Duvet with Black Piping
Hand tacked · 80s pure cotton sateen shell