Side by side on a bed, a silk pillowcase and a satin one look almost identical. Same sheen, same fluid drape, same smooth surface under your hand. We used to sell the second one. Here is exactly why we changed, and what it means if you are choosing between them.
The short answer
Silk is a fibre. Satin is a weave, and it is almost always polyester. Both give you the smooth, low-friction surface that hair and skin glide across at night, and that part of the old argument still holds. What we underestimated is everything the fibre does beyond the surface. Silk breathes, adapts to your temperature, and holds up over years in a way polyester satin does not.
Satin and silk are not the same thing
This is the point most shopping guides blur, so let us be precise.
Silk is a natural protein fibre spun by silkworms. Its quality is measured in momme weight. It is rare, labour-intensive to produce, and priced accordingly.
Satin is not a fibre at all. It is a weaving technique in which threads float over the surface instead of interlacing at every crossing. That floating structure is what creates the glossy face and the glide. Satin says nothing about what the threads are made of, and almost all satin bedding is woven from polyester.
So a pillowcase can be satin without containing any silk at all. In the EU the fibre composition must be stated on the label, and that label is the only thing worth reading.
How they compare, point by point
| Polyester satin | Mulberry silk | |
|---|---|---|
| What it is | A weave, usually polyester | A natural protein fibre |
| Feel | Smooth, cool on contact | Smooth, soft, adapts to your skin |
| Breathability | Holds heat as the night goes on | Moves moisture and warmth away |
| Sheen | Bright, light-catching lustre | Subtle, natural glow |
| Typical price per pillowcase | 20 to 40 euros | 50 to 130 euros |
| Care | Gentle machine wash | Cold delicate cycle, mesh bag, air dry |
| Longevity | Dulls after a season or two | Keeps its lustre for years |
What changed our mind
Breathability. This is the one we got wrong. Polyester does not breathe. It feels cool when you first touch it, then holds heat as the night goes on. Silk is a natural fibre that moves moisture away and adapts to your temperature. If you have ever woken up warm on a smooth pillowcase, that was the polyester, not the room.
Longevity. Polyester satin holds its finish for a season or two, then dulls. Silk, washed properly, keeps its lustre for years. The cost per night stops favouring satin somewhere around the second year.
What the fibre is made of. Polyester is plastic. It sheds microfibres in every wash. That was not part of our original argument, and it should have been.
And the honest one. Our case for satin was really a case about price. Everything we praised was “almost as good, for a quarter of the cost”. That is a legitimate argument. It is not the same as saying satin is better.
Momme: the number that actually matters
If you take one thing from this page, take this. Momme is the weight of silk fabric, and it is the single most useful number when comparing two silk pillowcases.
| Momme | What it means |
|---|---|
| 12 to 16 | Light. Fine for scarves, too fragile for bedding |
| 19 | The standard for quality bedding. Durable, fluid |
| 22 | Denser, heavier drape, longer life |
| 25 and up | Very heavy. Rare, and priced accordingly |
Our pillowcases are 19 momme. A listing that does not state its momme is telling you something: a producer who has invested in the weight always puts it in the title.
Where satin still makes sense
We are not going to pretend satin is worthless. We sold it. If your budget is firmly under thirty euros, a well-made satin pillowcase gives you a genuinely smooth surface, and that surface is what reduces friction on hair and skin. It machine washes without ceremony. For a guest room, a suitcase, or a first try, it does the job. What it will not do is breathe, and it will not last the way silk does.
What silk costs, and why
A silk pillowcase costs three to five times a satin one. The gap is structural, not a margin decision. Silk requires raising silkworms, harvesting cocoons and reeling a limited yield of fibre through a labour-intensive process. Roughly 2,500 cocoons produce a single kilogram of raw silk. There is no version of that which becomes cheap.
The corollary is worth knowing when you shop: a full silk bedding set offered under two hundred euros is not silk. The material alone costs more than that.
So which should you buy?
Buy silk if you sleep warm, you want the piece to last, you care what the fibre is, or you already know how a natural fibre feels against your skin.
Buy satin if budget is the deciding factor and you would rather have a smooth surface now than the right one later.
Either way, buy two per pillow. Both fabrics want washing every few days, and a rotation is the only way that actually happens. We worked through the arithmetic in how many pillowcases you really need.
Silk asks for a gentler routine than satin: cool water, no softener, no tumble dryer. It takes five minutes, and it is all set out in our complete silk care guide.
Frequently asked questions
Is silk better than satin for hair?
Both give the low-friction surface that reduces overnight tangles and frizz. Silk adds breathability and lasts considerably longer. For curly and textured hair specifically, we go into the mechanics in silk vs cotton for curly hair.
Is satin real silk?
No. Satin is a weave and is usually polyester. Silk is a natural fibre. A pillowcase can be satin without containing any silk at all, which is exactly why the composition label matters.
What momme should I buy?
19 momme for bedding. Below 16, silk is too light for something you sleep on and wash every few days. Above 22, you are paying for weight you will not notice on a pillowcase.
Why did you switch from satin to silk?
Because our argument for satin was really an argument about price, and because polyester does not breathe. We would rather sell one thing we believe is right than defend a compromise.
Is silk hard to care for?
Less than its reputation suggests. Cool water, a silk detergent, no softener, air dry. Five minutes, and it lasts years.
If you are going to sleep on something for eight hours a night, sleep on the fibre. Our silk pillowcases are 19 momme mulberry silk, in ten colours, with free worldwide shipping.
