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The best silk pillowcase for most people is a 22 to 25 momme, 100% mulberry silk pillowcase, like the Fishers Finery 25mm or the Blissy 22 momme. Silk is smooth, breathable and gentle on hair and skin. But be clear about what you are buying: the famous claims about fewer wrinkles, less frizz and clearer skin are reasonable, not proven. The only finished acne trial of a silky pillowcase found it did no better than cotton.
As a biologist, I love that silk starts life as a caterpillar’s home. The silkworm, the caterpillar of the domestic silk moth Bombyx mori, spins its cocoon from a single protein thread. We have turned that tiny shelter into one of the most luxurious fabrics on earth. In this guide I explain what silk really is, what the research says, and how to choose a pillowcase that is worth the money.
Are silk pillowcases worth it?
Yes, if you value comfort and want a gentler surface for your hair, and if you buy real mulberry silk at a decent weight. A good silk pillowcase feels cool and smooth, does not absorb as much of your skincare as cotton, and can last for years with gentle washing.
No, if you expect it to cure acne or erase wrinkles. There is not enough evidence for that yet, and I will show you why below.
What silk really is: a biologist’s view
Silk is an animal protein. Raw silk is made of two proteins: fibroin, the strong core fiber (70 to 80%), and sericin, a natural gum that glues the fibers together (20 to 30%), according to a review by Padamwar and Pawar. Most of the sericin is washed away when silk is processed, leaving the smooth, glossy fibroin you feel on a pillowcase.
Mulberry silk comes from silkworms fed only on mulberry leaves, which gives long, even, very fine fibers. That is why almost every good silk pillowcase is mulberry silk.
There is also an ethical side worth knowing. In conventional silk production, the cocoons are heated with the pupae still inside, so the long thread can be unwound in one piece. Peace silk, also called ahimsa silk, waits until the moth has left the cocoon. It is rarer and the fibers are shorter, but it is an option if animal welfare matters to you.
Silk pillowcase benefits for hair and skin
- Less friction: silk is very smooth, so hair glides over it instead of catching. Many people with curly or fragile hair notice less frizz and fewer tangles in the morning.
- Less absorbent than cotton: cotton soaks up moisture and night creams. Silk absorbs less, so more of your skincare stays on your skin.
- Breathable and cool: silk is a natural fiber that lets air through, which feels pleasant on warm nights.
- Softer sleep creases: a smooth surface may leave fewer temporary pillow lines on your face in the morning.
These benefits make sense from how silk is built, and they match what many users report. What they do not have yet is strong clinical proof. That brings us to the trials.
Case study: what the acne trials actually found
I looked for every registered trial that tested pillowcases on skin. The most useful one comes from Wake Forest University, registered on ClinicalTrials.gov. Forty people with acne slept either on a silk like pillowcase or on an ordinary cotton pillowcase for 12 weeks, and the researchers counted their acne lesions.
- The silk like pillowcase group had 13.1% fewer lesions after 12 weeks.
- The cotton pillowcase group had 21.7% fewer lesions.
- The uncertainty ranges overlap, so neither pillowcase clearly beat the other.
Two honest caveats. First, that trial used a silk like synthetic fabric, not real silk. Second, a newer double blind randomized trial on 100% mulberry silk, with 48 people with acne prone skin over 8 weeks, was registered in 2023, but no results have been posted yet. So the fair answer today is: we do not know if silk helps acne. Changing any pillowcase often and keeping it clean is the habit with the clearest logic behind it.
Silk vs satin pillowcase
This is the most common mix up. Silk is a fiber. Satin is a way of weaving fabric so one side is glossy. Most satin pillowcases are made of polyester, which is plastic. That means satin feels similarly smooth for your hair and costs far less, but it breathes less, can feel warmer, and sheds microplastic fibers in the wash.
If your main goal is less frizz on a budget, satin is a reasonable choice. If you want a natural, breathable fiber, choose real silk.
Momme, 6A grade and OEKO-TEX explained
Momme is the weight of silk. One momme equals 4.34 grams of silk per square meter, according to Store Norske Leksikon. A higher momme means more silk in the fabric, which usually means a denser feel and a longer life.
- 19 momme: lighter and more affordable, a good first silk pillowcase.
- 22 momme: the standard for quality pillowcases.
- 25 momme and up: heavier, more durable and more luxurious.
- 6A grade: an industry grade used for the longest, most even raw silk fibers. It is a seller claim, not an independent certificate.
- OEKO-TEX Standard 100: an independent label showing the fabric was tested for harmful substances. Worth looking for on anything you sleep on.
Best silk pillowcases
Every pick below is listed as 100% mulberry silk. I chose them on momme, certifications and a long record of buyer reviews. Searches for silk pillowcases more than double in November and December, so these also make lovely gifts.
| Pillowcase | Momme | Best for |
|---|---|---|
| Fishers Finery 25mm | 25 | Best overall, most durable |
| Blissy | 22 | Best known brand |
| Slip | 22 | Luxury gift |
| ZIMASILK | 19 | Best budget pick |
| Set of 2, silk on both sides | check listing | Best value pair |
1. Fishers Finery 25mm Mulberry Silk Pillowcase
A heavier 25 momme silk with an OEKO-TEX certification and around 9,000 Amazon reviews. The extra weight gives a denser feel and should hold up longer to washing. My top pick if you want one pillowcase that lasts.
2. Blissy Silk Pillowcase
Probably the best known silk pillowcase brand, with more than 10,000 reviews. It is 22 momme, 6A grade mulberry silk and comes in many colors. A safe, popular choice.
3. Slip Silk Pillowcase
The pillowcase that made silk pillowcases famous. It is 22 momme mulberry silk with beautiful packaging, which makes it the classic luxury gift.
4. ZIMASILK Mulberry Silk Pillowcase
With more than 52,000 reviews, this is one of the best selling silk pillowcases on Amazon. It is 19 momme and silk on both sides, so it costs less while still being real mulberry silk.
5. Mulberry Silk Pillowcase Set of 2
A two pack with silk on both sides, rated 4.6 stars by more than 3,000 buyers. A good way to have a spare for washing days.
How to wash a silk pillowcase
- Wash by hand in cool water, or on a delicate cycle inside a mesh laundry bag.
- Use a gentle, pH neutral detergent made for silk or wool. Never use bleach.
- Do not wring it. Roll it in a towel to remove water, then air dry away from direct sun.
- Iron on low heat from the reverse side if needed.
A silk pillowcase pairs well with breathable sheets, like these bamboo bedding sets, and with a gentle haircare routine, such as a good natural hair conditioner.
The bottom line
A silk pillowcase is a small, beautiful luxury made by a caterpillar. It is smooth, breathable and kind to hair, but it is not a proven acne or wrinkle treatment. Choose 22 to 25 momme mulberry silk with an OEKO-TEX label, wash it gently, and enjoy it for what it truly is.
Silk pillowcase FAQ
Are silk pillowcases worth it?
They are worth it if you want a smooth, breathable surface that is gentle on hair and absorbs less of your skincare. They are not a proven treatment for acne or wrinkles, so buy one for comfort rather than as a cure.
What is the best momme for a silk pillowcase?
22 momme is the standard for a quality silk pillowcase, and 25 momme is heavier and more durable. 19 momme is lighter and more affordable. One momme equals 4.34 grams of silk per square meter.
Is silk or satin better for hair?
Both are smooth, so both can reduce friction on hair. Silk is a natural, breathable protein fiber. Satin is a weave that is usually made of polyester, which is cheaper but less breathable.
Do silk pillowcases help acne?
There is no proof yet. In the only finished trial, a silk like pillowcase reduced acne lesions by 13.1% and cotton by 21.7% over 12 weeks, with no clear difference. A trial on real mulberry silk has not posted results.
How often should you wash a silk pillowcase?
Wash it about once a week, or more often if you have acne prone skin, by hand or on a delicate cycle in cool water with a gentle detergent, then air dry it.
What does 6A grade silk mean?
6A is an industry grade for the longest and most even raw silk fibers. It is a claim made by sellers rather than an independent certification, so also look for an OEKO-TEX label.
Erzsebet Frey (Eli Frey) is a biologist and science communicator with Bachelor of Science in Biology, and Master of Science in Ecology from the University of Belgrade. Originally from Serbia, she has lived in Sri Lanka since 2017. Eli has worked internationally in countries like Oman, Brazil, Germany, and Sri Lanka. In 2018, she expanded into SEO and blogging, completing courses from UC Davis and Edinburgh. Eli has founded multiple websites focused on biology, ecology, environmental science, sustainable and simple living, and outdoor activities. She enjoys creating nature and simple living videos on YouTube and participates in speleology, diving, and hiking.