Is satin the same as silk?

No. Silk is a natural fibre spun by the silkworm. Satin is a type of weave, which describes how the threads are crossed rather than what they are made of. Satin can be woven from any fibre, and pillowcases sold as satin are almost always polyester.

Is a silk pillowcase better than a satin one?

For skin and hair, yes. Both are smooth and low friction, but silk also breathes, absorbs and releases moisture, stays cool, does not build up static and lasts far longer. Polyester satin traps heat and sweat, creates static that causes frizz, and pills and dulls with washing.

What is a satin pillowcase made of?

Usually 100 percent polyester, sometimes nylon, a polyester blend, rayon or acetate. Check the fibre composition label rather than the product name, because the word satin only describes the weave.

Why is silk more expensive than satin?

Silk is a natural protein filament that has to be reeled and woven, while polyester is an inexpensive synthetic. Over the life of the product the gap narrows, because a 19 momme silk pillowcase stays in use for years while polyester satin pills and is replaced.

What does momme mean and what number should I look for?

Momme is the weight measure for silk, similar in spirit to thread count. Below 16 momme the cloth is thin and snags easily. Around 19 momme is the accepted standard for bedding, heavy enough to last while still feeling fluid. Treat any silk pillowcase that does not state its momme with caution.

No. Silk is an animal fibre, so it cannot be vegan, and that includes peace silk. Our silk is PETA certified cruelty free, undyed and never chemically treated, but if you need a plant based pillowcase then silk is not the right choice for you.

Does a silk pillowcase actually reduce wrinkles?

It reduces the nightly friction and creasing that contribute to them, and it does not absorb your night time skincare the way cotton does. It will not remove lines that are already there. Think of it as prevention rather than treatment.

Does satin cause frizz?

Polyester satin is slippery, so it causes less friction than cotton, but it does generate static, and static is a common cause of frizz and flyaway hair in the morning. Silk does not build the same charge.

How do I wash a silk pillowcase?

Cool water, gentle cycle, in a mesh laundry bag, with a detergent that contains no bleach and no enzymes. Skip fabric softener because it coats the fibre and removes the slip. Hang to dry away from direct sunlight and press on a low setting if needed.

Silk vs Satin Pillowcases: Which Is Better?

The short answer: silk is a fibre. Satin is a weave. Nearly every pillowcase sold as "satin" for hair and skin is woven from polyester, which is plastic. Silk is a protein fibre, chemically much closer to your own hair and skin than any synthetic. Both feel smooth under your cheek. Only one of them also breathes, absorbs moisture, stays cool and still looks good after years of washing. If you are choosing between the two for your face and your hair, choose the silk.

Written by Kamila Kingston, qualified acupuncturist and co-founder of White Lotus Beauty, established 2004. Last reviewed September 2026.

White Lotus 19 momme pure mulberry silk pillowcase in its natural undyed colour — *Our 19 momme mulberry silk: undyed, never chemically treated and PETA certified cruelty free.*

Satin is not a fabric. It is a way of weaving

This is the whole reason the question is confusing. Cotton, wool, linen and silk are fibres: they describe what the cloth is made of. Satin is a weave structure: it describes how the threads are crossed over each other to put most of the surface on one face of the cloth, which is what gives that liquid shine and slip.

So "satin" tells you almost nothing about what you are buying. It is a finish, not a material. And that vagueness is useful to anyone selling a cheap pillowcase at a premium price, because the word sounds luxurious while committing to nothing at all.

So what is a satin pillowcase actually made of?

In the hair and beauty aisle, almost always polyester. Sometimes nylon or a polyester blend, occasionally rayon or acetate. Read the fibre composition label rather than the product name and you will usually find "100% polyester" in small print, while the headline says satin.

Polyester satin does one thing well, and it is worth saying plainly: it is slippery, so it creates less friction against hair than a cotton pillowcase. It is also cheap and it survives a hot wash. That is the honest case for it, and it is the entire case for it.

Silk: what you are actually paying for

Silk is spun by the silkworm as a continuous protein filament. It is one of the very few textiles that is neither a plant nor a plastic, and its behaviour against skin is genuinely different.

It breathes and it regulates temperature

Silk moves air and it moves moisture, so it sits cool against your face in summer and does not feel clammy in winter. Polyester does the opposite: it traps heat and holds sweat against the skin, which is why so many people who switch to a synthetic satin case find they wake with a hot, damp face.

It is smooth without being static

Polyester generates static, which is how you end up with frizz and flyaway hair in the morning even on a slippery case. Silk does not build up the same charge, so hair lies flatter when you get up.

Momme is the number that matters

Momme is silk's weight measure, in the same spirit as thread count. Anything under 16 momme is thin enough to snag and wear through quickly. Our pillowcase is 19 momme, which is the sweet spot the industry agrees on for bedding: substantial enough to last for years of washing, still light and fluid against the face. Be wary of any silk pillowcase that does not publish its momme at all.

Mulberry silk, and cruelty free

Mulberry silk comes from silkworms fed only mulberry leaves, which produces the longest, whitest and most even filament, and therefore the smoothest cloth. Ours is mulberry silk and it is PETA certified cruelty free. It is never chemically treated or stripped, and it is undyed in its natural colour.

One thing we will not pretend: silk is an animal fibre, so it is not vegan, and no producer can honestly claim otherwise. If you need a plant based pillowcase then silk is not your answer, and we would rather tell you that than sell you something on a false claim.

Silk versus satin at a glance

	Mulberry silk	Polyester satin
What it is	A natural protein fibre	A weave, almost always made of plastic
Low friction on hair	Yes	Yes
Breathable	Yes	No, it traps heat
Handles moisture	Absorbs and releases it	Holds it against the skin
Static and frizz	Very little	Builds up static
Temperature	Cool in summer, warm in winter	Runs hot
How it ages	Softens, and lasts years at 19 momme	Pills, dulls and goes shiny
Sheds microplastics in the wash	No	Yes
Upfront price	Higher	Lower

A white pure silk eye mask on a marble background — *The pure silk eye mask, in the same 100% mulberry silk as the pillowcase.*

What silk will and will not do for you

We would rather you buy once, happily, than buy on a promise we cannot keep. So, plainly:

What a silk pillowcase does. It reduces the friction and the drag that a cotton case applies to your face and hair for seven or eight hours a night. Less drag means fewer of those morning sleep creases pressed into the cheek, less mechanical stress on fragile or chemically treated hair, less breakage at the hairline and less frizz. It also does not wick your moisturiser or serum off your face the way absorbent cotton does, so what you put on at night is still working at three in the morning. And it stays cool, which matters more than most people expect.

What it does not do. It will not erase existing wrinkles, regrow hair or replace your skincare. Nothing you sleep on can. Sleep creases and the lines that eventually set into them are real, and reducing the nightly cause of them is worth doing, but a pillowcase is a preventative measure, not a treatment.

The part people get wrong about price

Polyester satin looks like the thrifty choice on the day you buy it. Then it pills, the shine goes flat and grey, and it gets replaced. A 19 momme silk case, washed properly, is still in use years later and softer than when it arrived. Spread across the nights you actually sleep on it, real silk usually works out the cheaper of the two, and it is unquestionably the nicer of the two to spend a third of your life against.

Where to start

If you are buying one thing, buy the pillowcase. It covers the most skin and the most hair for the most hours.

White Lotus silk pillowcase and silk eye mask set — *The pillowcase and eye mask set, which is where most people end up.*

19 momme mulberry silk pillowcase. The one to get first. Cruelty free, undyed, never chemically treated, and heavy enough to still be yours in five years.
Pure silk eye mask. For anyone who travels, naps, or sleeps somewhere that is never quite dark enough. It also keeps the delicate skin around the eye out of contact with the pillow altogether.
Silk lined cap. Silk against the hairline while you are awake, for training, for the gym, or for anyone protecting fine or thinning hair from a rough cotton lining.
The full silk collection, including silk scrunchies and the pillowcase and eye mask set, which is the usual next step after the case itself.

White Lotus cruelty free mulberry silk scrunchies in packaging — *Mulberry silk scrunchies, for the hair friction you cause during the day rather than at night.*

Making it last

Silk is far less fragile than its reputation suggests. Wash it cool, on a gentle cycle, in a mesh bag, with a detergent that has no bleach and no enzymes. Skip the fabric softener, which coats the fibre and kills the slip. Hang it to dry out of direct sun. Press on low if you want to, on the reverse. That is the whole routine, and it is why a good silk case outlives several polyester ones.

Silk vs Satin: What Is the Difference and Which Is Better?