Search for the best silk pillowcase in the UK and you'll find hundreds of options — from £12 impulse buys to £110 designer names. Somewhere in that pile is real, well-made silk. Much of the rest is polyester wearing a silk costume, or genuine silk so thin it won't survive a year of washing.
The frustrating part? You can't tell the difference from a product photo. A 16 momme blend and a 25 momme mulberry pillowcase look nearly identical on screen.
So here is a proper silk pillowcase buying guide — not a ranked list of brands (we'll explain why we don't do those), but the six things that actually determine whether a silk pillowcase is worth your money. Full transparency: we're Lunare Home, a silk brand based in Birmingham, and we make one of these. Which means you should judge us by exactly the same checklist. We'll show you how at the end.
The 6-Point Silk Pillowcase Buying Checklist
Every claim on a silk product page maps to one of six questions. If a listing can't answer all six, that silence is telling you something.
1. Momme weight: 22 is the sweet spot
Momme (pronounced "moe-me") measures the density of silk fabric — how much actual silk is woven into it. It's the single most useful number on any silk listing, and the first thing to check.
For pillowcases, 16–19 momme is the budget range: genuinely silk, but thinner, more prone to wear at the seams, and shorter-lived. 22 momme is the sweet spot — substantial enough to last years of weekly washing, smooth enough to do its job for your hair and skin. 25 momme exists at the premium-heavy end; it's lovely but you pay noticeably more for a difference most people can't feel. We've written a full explainer in our momme weight guide if you want the detail.
If a listing doesn't state momme at all, walk away. It's like buying a duvet with no tog rating.
2. Silk grade: look for 6A
Raw silk is graded from C up to A, with long-fibre mulberry silk subdivided into 2A through 6A. Grade 6A is the top tier — the longest, most uniform fibres, which means fewer weak points, a smoother surface and less pilling over time. Lower grades aren't a scam, but they won't wear as well, and there's no reason for a brand to hide the grade if it's good. Stated grade: good sign. Vague "premium silk" wording with no grade: less so.
3. Fibre: 100% mulberry silk, on both sides
This is where most cheap "silk" pillowcases fall apart, sometimes literally. Three things to verify:
- Mulberry silk, not just "silk". Mulberry silkworms produce the longest, finest fibres. Wild or blended silks are rougher and less consistent.
- 100% silk, not a silk-polyester or silk-cotton blend. Blends behave like their cheapest ingredient.
- Both sides. Some pillowcases are silk on top and polyester or cotton underneath. You'll flip your pillow at 3am and land on the cheap side.
And a word that should stop you instantly: satin. Satin is a weave, not a fibre — and in the UK market, "satin pillowcase" almost always means woven polyester. It looks shiny in photos and sleeps hot and staticky in real life. Our silk vs satin comparison goes deeper on this.
4. Certification: OEKO-TEX® Standard 100, with a number
Silk sits against your face for eight hours a night, so it matters what's in the dye and finish. OEKO-TEX® Standard 100 certification means the fabric has been independently tested for harmful substances.
Here's the part most buyers miss: a real certification comes with a certificate number, and you can verify it yourself on the OEKO-TEX® website in about thirty seconds. Brands that genuinely hold the certificate will share the number if you ask. A logo pasted onto a product image with no number behind it is a decoration, not a certification.
5. Construction: the details that show up in month six
Two pillowcases with identical silk can age very differently depending on how they're made.
Closure. A hidden zip keeps the pillow properly enclosed and stops it creeping out overnight. Envelope closures are simpler and some people prefer them, but the flap can gape on plumper pillows. Neither is wrong — just know which you're getting.
Dye. Colourfast dyeing matters more with silk than cotton, because silk is washed cool and gently. Poorly dyed silk bleeds in the first wash and fades to a tired version of itself by the tenth.
Size. The UK standard pillow is 50x75cm. Plenty of imported pillowcases are cut to US or EU dimensions and sit baggy or tight on a British pillow. Check the listing states the actual measurements, and look for a king option if that's what's on your bed.
6. The safety net: returns policy or sleep trial
Here's the honest truth this whole guide builds towards: you cannot fully verify momme weight or feel from a webpage. Photographs don't carry weight. The only real test is the pillowcase in your hands and under your head.
Which is why the final checklist item is the brand's returns policy. A company confident in its silk makes it easy to try — a proper trial period or a straightforward returns window. A company that knows its "silk" won't survive scrutiny buries a 14-day, unopened-only policy in the small print. The safety net isn't an extra. It's the mechanism that makes the other five points checkable.
What Does the Best Silk Pillowcase in the UK Cost?
Price alone won't tell you the best silk pillowcase in the UK from the worst — but the bands below are a reliable map of what your money typically buys in 2026.
| Price band | What you typically get | Verdict |
|---|---|---|
| Under £25 | Almost certainly polyester satin, a blend, or very low momme silk with no grade or certification stated | Avoid — you're buying the word "silk", not the fibre |
| £30–£50 | Entry-level real silk, often 19 momme, sometimes silk one side only; certification patchy | Workable if the listing passes the full checklist — check both sides and momme |
| £50–£75 | 22 momme, Grade 6A mulberry silk both sides, certified, proper construction | The value sweet spot — full spec without the label premium |
| £75–£110+ | Premium brand names, usually the same 22–25 momme spec as the band below it | Fine silk, but you're often paying for the name, not extra quality |
The pattern worth noticing: above £50, specification largely plateaus. A £95 pillowcase is rarely better silk than a £55 one — it's better marketed silk.
Red Flags: The Quick Recap
If you remember nothing else from this guide, screen every listing for these five:
- No momme weight stated. The most basic spec in silk. Its absence is a choice.
- "Satin" anywhere in the title or description. Weave word, polyester product.
- £12 prices. Real 22 momme mulberry silk cannot be made, shipped and sold for that. It's not a bargain; it's a different product.
- No verifiable certification. A logo without a certificate number proves nothing.
- Stock photos only. Brands proud of their fabric photograph their fabric — drape, sheen, seams, zip. Generic renders suggest the seller has never handled the product either.
When It Arrives: The First-Night Checks
Your checklist doesn't end at checkout. Two things to do when the parcel lands.
The weight and drape check. Real 22 momme silk has a surprising heft — it pours over your hand rather than floating, and it feels cool for a few seconds before warming to your skin. Thin or fake silk feels light, slippery and slightly plasticky, and polyester will cling to dry hands with static. If what arrived doesn't match what was promised, this is exactly what the returns policy is for. Use it without guilt.
The first wash. Silk needs a gentler routine than cotton: cool water, a delicate detergent, no tumble drying on heat. It's genuinely easy once you know the rules — our guide on how to wash a silk pillowcase covers the whole routine in a few minutes' reading. A quality pillowcase should come out of its first wash looking essentially unchanged. Colour in the water or puckered seams are early warnings worth acting on.
Silk Pillowcase Buying FAQ
Is a 19 momme silk pillowcase worth buying?
It can be, if it's honestly labelled, 100% mulberry on both sides and certified. You're trading some durability for a lower price — expect a shorter lifespan than 22 momme, especially with weekly washing. It's a reasonable entry point, not a like-for-like alternative.
How can I tell real silk from polyester satin at home?
Touch is the quickest test: real silk warms to your skin within seconds, while polyester stays cool and generates static. Real silk also has a soft, slightly matte lustre rather than a hard shine. The traditional burn test works too — silk smells like burnt hair — but the touch and static checks will settle it without sacrificing a corner of your pillowcase.
Do silk pillowcases actually help hair and skin?
The honest answer: silk reduces friction and absorbs less moisture than cotton, which means less overnight tugging on hair and fewer creases pressed into skin. That's mechanical, and real. What it won't do is transform your hair in a week — claims like that belong in the red flags section.
What size silk pillowcase do I need in the UK?
The UK standard pillow is 50x75cm, so that's the size to look for unless you have king pillows. Check the listed dimensions rather than the word "standard" alone — imported pillowcases are often cut to US sizing and fit poorly.
Judge Us by the Same List
We said at the start that we make one of these, so here's our pillowcase run through the same six points: 22 momme, Grade 6A, 100% mulberry silk on both sides, made from OEKO-TEX® Standard 100 certified silk, with a hidden zip and colourfast dye, at £50.99 — inside that £50–£75 value band, with free UK delivery over £40. And because point six matters most, every order comes with a 30-Night Sleep Trial: a full month to do the weight check, the drape check, the wash test, and decide with the pillowcase actually under your head.
We'd rather you buy the right silk pillowcase than just ours. But if ours passes your checklist, we'd love it to be the one on your bed. See the Lunare Home silk pillowcases — and hold us to every point above.
