Last reviewed: April 2026. An editorial guide from Dozzz, UK specialists in 22 momme mulberry silk sleep accessories.
Why this guide exists
The silk sleep mask market in the UK is genuinely confusing. One brand charges £8 for "silk" (it isn't). Another charges £80 for a version barely different from a £25 one. Third-party marketplaces are flooded with listings that use the word silk the way a supermarket pizza uses the word authentic.
This guide is the short answer to every question worth asking before you spend money on a silk sleep mask. It covers what silk actually is, what momme weight means and why 22 is the number that matters, the real benefits (backed by the studies that support them), how to spot a mask that's worth owning, and how to care for it so it lasts years rather than months.
We make silk sleep masks for a living, so we have a view. But this is written to be useful whether you buy from us or not — because the biggest problem in this category isn't which brand you choose, it's whether you end up with silk at all.
What a silk sleep mask actually is
A silk sleep mask is a soft, lightweight eye covering worn during sleep to block ambient light and reduce friction between your face and your pillow. The "silk" in the name refers specifically to the outer fabric — the part that touches your skin and hair. The filling, the strap and the lining may or may not also be silk, which is where a lot of the industry's marketing sleight-of-hand happens.
The material that belongs in this category is mulberry silk — a long-fibre silk produced by silkworms fed exclusively on mulberry leaves. It is the finest and most consistent grade of silk available, and it is the only type you should consider for a product that spends eight hours pressed against your face. Other silks exist (wild silk, tussah silk, spun silk) but they are coarser, less uniform, and not appropriate for bedding.
Momme weight: the only spec that matters
If you read one thing in this guide, make it this section. Momme (pronounced mummy) is the unit used to measure the weight and density of silk fabric. Think of it like thread count for cotton sheets, except more meaningful because silk is measured by actual weight per unit area rather than fibres per square inch.
The practical translation is simple:
- 12–15 momme — thin, cheap, transparent. Common in fast-fashion masks and multi-pack bundles. Feels silky in the hand but doesn't block light and tears easily.
- 16–19 momme — the standard for mid-range silk pillowcases and entry-level masks. Adequate but lightweight. Blocks some light but not complete darkness.
- 22 momme — the sweet spot for sleep masks. Dense enough to block light completely, substantial enough to feel considered, light enough to stay breathable and cool through the night. This is the weight serious silk-mask specialists use.
- 25 momme+ — heavier, stiffer, often too warm for summer sleep. More durable but the returns diminish quickly. Mostly used for luxury bedding, not masks.
Most brands at the lower end of the market don't publish their momme weight. That's a tell. If a product page lists "100% mulberry silk" but doesn't tell you the weight, assume it's 16 momme or lower. The better brands publish the number because the number is the point.
Silk vs satin vs cotton vs synthetic: the real comparison
Most sleep masks sold in the UK aren't silk at all. They're polyester satin (a weave, not a fibre), cotton, or cheap synthetic foam. Here's what actually separates them in practice.
| Feature | Mulberry silk (22 momme) | Polyester satin | Cotton | Synthetic / foam |
|---|---|---|---|---|
| Light blocking | Excellent — fabric density blocks ambient light | Good, depending on lining | Variable — thin cotton leaks light | Good with moulded shapes |
| Friction on skin | Lowest of any fabric — glides rather than drags | Low, but less than silk | High — creates sleep lines | Depends on inner lining |
| Breathability | Naturally temperature-regulating — cool in summer | Poor — traps heat, common cause of night sweats | Good, but absorbs moisture | Poor — synthetic foam insulates heat |
| Hypoallergenic | Yes — naturally resists dust mites and mould | No — collects mites | No — harbours allergens | Variable |
| Lifespan with care | 3–5 years | 6–18 months before pilling | 12–24 months | 6–12 months — foam degrades |
| Typical price range | £30–£70 | £5–£15 | £8–£20 | £10–£40 |
The honest summary: polyester satin imitates the feel of silk but not the function. It looks similar on a product photo and feels similar in the hand for the first week, then starts pilling and trapping heat. Cotton is breathable but the friction is significant enough that regular use creates visible sleep lines and tugs the delicate skin around the eyes. Foam and synthetic masks block light well but insulate heat, which makes them miserable in warmer months.
Silk is the only fabric that performs well across all five criteria. It is also the only one that gets better with time — a well-cared-for 22 momme silk mask becomes softer over years of use rather than degrading.
The benefits, and what the research actually says
There are real, documented benefits to a silk sleep mask. There are also a lot of slightly overheated claims. Here's the honest version.
1. Deeper, more restorative sleep
The primary function of any sleep mask is to block ambient light. Light exposure during sleep — even low-level light from a street lamp or a partner's phone — suppresses melatonin production and shortens REM sleep cycles. A 2010 study published in Critical Care found that using eye masks and earplugs significantly improved melatonin levels and REM sleep quality in a hospital environment, and the same effect has been shown in home settings. The effect isn't subtle — people who block light consistently report falling asleep faster and waking less in the night.
Silk doesn't do anything additional here that any dense, well-fitted mask wouldn't do. What silk does is make the experience comfortable enough that you actually keep wearing it every night, which is where the real benefit compounds.
2. Fewer sleep lines and less overnight friction on the skin
This is where silk genuinely outperforms other fabrics, not just marginally but significantly. Research published in the Journal of Cosmetic Dermatology has shown that silk's smooth surface creates substantially less friction than cotton or polyester when pressed against skin for extended periods. Less friction means less stretching, less tugging at the delicate skin around the eyes, and fewer of the creases that eventually become fine lines.
Dermatologists have been recommending silk pillowcases for the same reason for years. A silk mask extends the benefit to the specific area — around and underneath the eyes — where skin is thinnest and most prone to lines.
3. Hair protection overnight
The strap of a silk mask, unlike elastic on cheaper alternatives, doesn't snag or tangle hair as you shift position. This is a small thing until you've woken up with a kink in your hair for the fifth morning running. Mulberry silk's smooth fibres also reduce breakage along the hairline where the strap sits.
4. Naturally cool and breathable — particularly during menopause
Silk is one of the few natural fibres that actively regulates temperature. It wicks moisture away from the skin and doesn't trap heat the way polyester or foam do. For anyone experiencing night sweats or hot flushes — which includes most women during perimenopause and menopause — a silk mask is one of the few sleep aids that genuinely helps without adding to the problem.
5. Hypoallergenic and skin-safe
Mulberry silk is naturally resistant to dust mites, mould and common allergens. This makes it a better choice than cotton or synthetic for anyone with sensitive skin, eczema, or allergies. Look for Oeko-Tex certification on the product page — it guarantees the silk has been tested and confirmed free from harmful chemicals in dyeing and finishing.
Flat vs 3D contoured: which style is right for you
There are two main sleep mask shapes. The classic flat design sits directly against your eyes and cheekbones. The 3D contoured design (sometimes called "space mask" or "pressure-free") has moulded cavities around the eyes, so nothing touches your eyelids or lashes.
Which one suits you depends on three things:
- Are you a side sleeper? A 3D mask handles pressure from a pillow better because the mask itself creates the space. Flat masks work fine for back sleepers but can dig in when you roll over.
- Do you wear lash extensions or lash serum? A 3D mask doesn't touch the lashes, which matters hugely if you've invested in extensions or are mid-growth cycle on a serum.
- Do you find flat masks oppressive? Some people simply don't like the feeling of fabric directly on the eyes. A 3D mask solves this with zero pressure on the lids.
If none of those three apply, the classic flat design is perfectly suited — and generally less expensive.
How to choose a silk sleep mask: the checklist
Work through these seven questions before buying. Any mask that fails two or more of them probably isn't worth the price being asked.
- Does the product page specify momme weight? If yes, is it 22 or higher? If the weight isn't listed, assume it's low.
- Is it 100% mulberry silk, or a blend? Blends are often 50% silk, 50% polyester. Fine at the right price, not at a silk-mask price.
- Is the silk Oeko-Tex certified? This is the international standard for textiles tested free from harmful chemicals. Worth insisting on for anything pressed against skin overnight.
- Are both sides silk? Some cheaper masks use silk on the outside only and polyester on the inside. Check.
- Is the strap adjustable? A fixed-length strap fits few heads well. An adjustable strap fits most.
- Does it block light completely? Good product photography will show the mask against a face or light source. If no one's willing to prove full blackout in a photo, the mask probably doesn't deliver it.
- Is there a clear care guide? Silk needs gentle handling. A brand that doesn't tell you how to wash the product is a brand that doesn't expect you to.
How to care for a silk sleep mask so it lasts
With proper care, a 22 momme mulberry silk mask will last three to five years. With no care at all, it'll last twelve months. Treat it like you would a silk shirt — because that's what it is.
- Wash by hand or on a delicates cycle in cool water (below 30°C). Use a mesh wash bag if you're using a machine.
- Use a silk-safe detergent. Regular laundry detergent contains enzymes that break down the protein fibres in silk. Any detergent labelled for silk, wool or delicates is fine.
- No fabric softener. It coats the silk and reduces its natural sheen. Silk doesn't need softening — it's already soft.
- Never tumble dry. Heat damages silk permanently. Hang to dry away from direct sunlight.
- Don't iron. If the mask creases, a quick steam from a hanging steamer or even the steam from your shower will relax it.
- Store it in the pouch or box it came in. Keeping it out of direct light prolongs the colour vibrancy for years.
Frequently asked questions
Does a silk sleep mask really improve sleep quality?
Yes. Blocking light during sleep has been repeatedly shown to increase melatonin production and improve REM sleep. A silk mask does this comfortably enough that you actually wear it every night, which is where the benefit compounds. The silk material itself doesn't block more light than a well-fitted polyester mask — but it's the comfort and breathability that make silk the format people stay with for years.
Can you wash a silk sleep mask?
Yes, and you should, gently and regularly. Hand wash or use a delicates cycle in cool water with a silk-safe detergent. Never tumble dry. Never iron. Hang dry away from sunlight. With proper care, a 22 momme mask lasts three to five years.
What's the difference between silk and satin sleep masks?
Silk is a fibre — a natural protein produced by silkworms. Satin is a weave, and the vast majority of satin sleep masks are woven from polyester, not silk. Polyester satin looks similar in product photos and feels smooth for the first week of use, but it traps heat, pills, and creates more friction on the skin than real mulberry silk.
Is 22 momme silk better than 19 momme?
For a sleep mask, yes. 22 momme is denser and blocks light more completely while still being breathable. 19 momme is perfectly fine for silk pillowcases where the fabric is already multi-layered under your head, but it's thin for a mask and often lets light through at the edges.
Do silk sleep masks help with menopause night sweats?
Yes — genuinely. Silk is one of the few natural fibres that actively regulates temperature and wicks moisture. Polyester masks trap heat against the skin, which is the last thing anyone in perimenopause or menopause needs. A breathable silk mask adds no thermal load while still blocking light for deeper sleep.
Are silk sleep masks good for side sleepers?
Yes, but a 3D contoured design suits side sleepers better than a flat one. When you roll onto your side, a flat mask can press into the pillow and shift out of position. A 3D mask has moulded cavities around the eyes so the pressure falls on the mask itself, not your face.
Will a silk sleep mask damage eyelash extensions?
A flat silk mask shouldn't damage extensions — silk is one of the gentlest fabrics available — but any flat mask can press against lashes and shorten their lifespan. If you wear extensions, a 3D contoured silk mask is the safer choice because it doesn't touch the lash line at all.
How much should a silk sleep mask cost?
Genuine 22 momme mulberry silk masks from reputable UK brands sit in the £30–£70 range. Anything under £20 claiming to be mulberry silk is almost certainly a lower momme weight or a silk blend. Anything over £80 is usually paying for a premium brand, not premium silk.
A note on how we think about this
Dozzz makes 22 momme mulberry silk sleep masks — both classic flat and 3D contoured — in a range of colours, hand-finished in the UK with Oeko-Tex certified silk. We started the brand because the UK market sat in an awkward gap: plenty of luxury brands charging a premium for silk masks with no technical substance behind them, and plenty of marketplace listings selling "silk" that wasn't. We wanted to build something in the middle — proper silk, proper specification, fair price.
If that sounds like what you're looking for, browse the full range. If not, at least you now know enough about silk, momme, and what to look for that you'll pick the right mask regardless of where you buy it. Sleep well.
This guide was last reviewed in April 2026. Written by the Dozzz editorial team. If you have a question we haven't answered, email pillowtalk@dozzz.co.uk.