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Listening at home⏱️ Estimated reading time: 18 min
On this page: Overview
Key Takeaways
A good sleep mask seals against the nose bridge and cheekbones so light cannot creep in, feels soft enough to forget about, and stays put on a strap that holds its tension. It should also survive regular washing. Which? found that light blocking depends mainly on fit, not on how thick or expensive the fabric is.
Mulberry silk costs more and buys a smoother surface with less friction on the skin around the eyes, and it takes up more moisture before it feels damp (11.0 % moisture regain against 8.5 % for cotton). It does not buy more darkness. Cotton is breathable and temperature-regulating, and much cheaper.
Neither shape wins by default. A contoured mask keeps fabric off the eyelids and can seal well on some faces, while a flat mask moulds closely to the nose and cheeks. Whichever shape sits flush against your own face, with no gap at the nose bridge, blocks more light.
Side sleepers usually do best with a thin, flexible mask and a flat strap with no bulky buckle. Thick foam presses against the temple on a firm pillow and can shift, which opens a gap for light. A slim silk or cotton mask flexes with the pillow instead.
Flat cotton and polyester satin masks typically cost £5–£15, and Which? notes a good mask can cost under £15. Mulberry silk masks typically sit between £20 and £70. The extra money buys the fibre, a better strap and washability, not a better night by itself.
The best sleep mask in the UK is not the one at the top of a tested list. It is the one that fits your face, because most masks let a little light in at the nose, and that thin bright line is what people notice at 5 am in June. A sleep mask has one job, darkness, and how well it does that comes down to fit far more than price.
At Bollsen, we make sleep products trusted by 1,000,000+ people, from our Life+ earplugs to a mulberry silk mask. This is our guide to how to choose a sleep mask without guesswork. We won’t hand you a ranking of brands. You get the five checks that decide whether a mask works for you, six mask types compared in one table, and a straight verdict for each kind of sleeper.
The NHS Every Mind Matters sleep advice recommends a room that is quiet, dark and cool, and suggests wearing an eye mask if light is still a problem. Streetlights and a partner’s phone are hard to shut out with curtains alone, and so is a 4.45 am summer dawn.
What should you look for in a sleep mask?
Look at five things, in this order: the light seal at the nose bridge and cheekbones, the material against your skin, the shape (flat or contoured), the strap and how it holds tension, and washability. Price comes last, because it predicts very little about how dark a mask keeps you.
That order is close to how testers judge masks. Which? tests eye masks for sleep with a digital light meter and rates them on light blocking, comfort, fit and security, and ease of cleaning. Its conclusion on darkness is worth holding on to. Light blocking depends mainly on fit and on leaks around the eyes and nose, not on fabric quality or density.
So a thick, plush mask that leaves a gap at your nose will lose to a thin one that sits flush. Fit first, then everything else.
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Light gets in around the nose because the nose bridge is the one place where a mask has to cross a sharp ridge, and most masks bridge it rather than follow it. That leaves a small tunnel on each side, and the cheekbones can lift the lower edge in the same way.
Closing your eyes is not enough on its own. The Sleep Foundation’s guide to light and sleep explains that eyelids can’t block sufficient light, and that darkness prompts the body to produce melatonin while light slows it down. For scale, direct sunlight can reach 10,000 lux, while bright office lighting rarely goes above about 500 lux. A summer sunrise through thin curtains lands somewhere in between, which is why it reaches you even with your eyes shut.
There is a simple test at home. Put the mask on in a dark room, hold a phone torch about 30 cm from your face and move it slowly around the edges. If you see a glow at the nose bridge or under a cheekbone, that is where morning light will get in too. Our guide on why some sleep masks still let light in goes through each leak point and how to close it.
Silk, cotton or polyester satin: which material is best?
Mulberry silk is the smoothest and handles damp best, cotton is breathable, cheap and easy to wash, and polyester satin imitates the feel of silk at a lower price but holds more heat. None of the three blocks more light by itself. The material decides comfort, not darkness.
Silk is a long continuous filament, while cotton is made of short fibres spun together, so a silk surface has lower friction against the skin around the eyes. Silk also has a higher moisture regain. The ASTM D1909 table of commercial moisture regains lists silk at 11.0 % and cotton at 8.5 %, which means silk takes up more damp before it starts to feel wet.
Cotton deserves more credit than it gets in luxury round-ups. It is breathable and temperature-regulating, it shrugs off hot washes, and a good cotton mask costs a fraction of a silk one. Polyester “satin” is a weave, not a fibre, so check the label. A satin mask can look like silk on a shop shelf and feel quite different by 3 am.
Which leaves the real question for anyone eyeing the best silk sleep mask they can find: is a silk sleep mask worth it for the way you sleep? Our silk guide weighs what the extra money actually buys. For a straight head-to-head on feel, heat and washing, see our comparison of silk vs cotton sleep masks.
Contoured or flat: which shape blocks more light?
A contoured mask uses moulded foam cups that hold the fabric off your eyelids, while a flat mask lies against the face and follows its shape. Neither blocks more light in every case. The one that sits flush with your particular nose bridge and cheekbones wins.
Contoured masks suit people who dislike any pressure on the eyelids, and the raised cups leave a little air space around the eyes. The trade-off is structure. Foam can shift when you roll over, and a firm cup that does not match your face can lift away at the nose. Flat masks mould more easily, are thinner and pack smaller, but they do rest on the eyelids.
Face shape matters more than people expect. A high nose bridge often leaves a gap under a flat mask, while deep-set eyes can make cups press in the wrong place. Our comparison of contoured vs flat sleep masks covers who each shape suits in more detail.
Is Velcro or elastic better on a sleep mask strap?
An adjustable Velcro strap usually lasts longer, because it holds the tension you set and does not stretch out. A plain elastic strap is simple and has no hardware, but it slowly loses tension, and once it goes slack the mask slides and light gets in at the edges.
Strap failure is one of the most common complaints about masks. “My sleep mask is falling apart” is a familiar line on sleep forums, and it is usually the elastic that has gone, not the fabric. Cheap Velcro has its own problem, as rough hook tape can catch hair. Check that the hook side is narrow, sits flat and closes fully on itself before you buy.
Placement matters as well. A strap that runs too high pulls the bottom edge of the mask away from the cheekbones, and one that runs too low pushes it up off the nose. Our guide on how to stop a sleep mask falling off shows where the strap should sit for each sleeping position.
Can you machine-wash a silk sleep mask?
Some silk sleep masks can be machine-washed at 30 °C in a laundry bag, but many are labelled hand-wash only. Check the care label before you buy, because a mask you dread washing is a mask you will not wash often enough.
A mask sits against your skin for seven or eight hours a night and picks up skin oils, moisturiser and sweat. Which? suggests washing a silk mask about once a week and masks made of other materials about twice a week, and more often if the skin around your eyes feels irritated. A mask that has gone weeks without a wash is not something you want against your eyes.
Cotton and polyester masks usually go in the machine without fuss. Foam contoured masks and weighted masks are harder, as the filling can lose shape or clump. Gel masks are generally wiped clean rather than washed. Our guide on how to wash a silk sleep mask covers temperature, detergent and drying.
How do the six types of sleep mask compare?
The six common types of sleep mask differ more in comfort, care and price than in darkness, since the light seal depends on fit. The table below compares each category on what it is usually like, not on any single tested product.
| Mask type | Light seal | Feel | Strap (typical) | Washability | Packability | Typical UK price band |
|---|---|---|---|---|---|---|
| Flat cotton | Good if it fits flush; often leaks at the nose | Soft, breathable, slightly textured | Elastic | Usually machine-washable | Folds flat | Roughly £5–£15 |
| Flat polyester “satin” | Similar to cotton; depends on fit | Smooth but can feel warm | Elastic | Usually machine-washable | Folds flat | Roughly £5–£15 |
| Flat mulberry silk | Good if it fits flush; moulds to the face | Smoothest, low friction, light | Elastic or adjustable | Often hand-wash only; some 30 °C | Folds flat | Roughly £20–£70 |
| Contoured / 3D foam | Can seal well; may lift at the nose on some faces | No contact with eyelids; bulkier | Elastic or adjustable | Often hand-wash or wipe only | Bulky, does not fold well | Roughly £8–£30, some up to about £55 |
| Weighted | Usually good, as weight presses edges down | Gentle pressure; heavier on the face | Often loose or strapless | Usually hand-wash or cover only | Heavy to pack | Roughly £15–£40 |
| Gel / cooling | Often modest; built for cooling, not darkness | Cold at first, then warms to skin temperature | Elastic | Wipe clean | Needs a fridge to work | Roughly £5–£15 |
Price bands are rough ranges seen at UK retailers and vary by shop and season. If pressure appeals to you, our comparison of weighted vs silk eye masks explains what the extra weight does and doesn’t do. If heat is your concern, our guide to cooling eye masks covers gel masks and chilled fabric masks. Masks with built-in speakers are a separate category, and our guide to noise-cancelling sleep masks covers them.
How much should a good sleep mask cost in the UK?
A good sleep mask can cost under £15, as Which? points out. Flat cotton and satin masks typically sit between £5 and £15, contoured foam between £8 and £30, and mulberry silk between £20 and £70. Paying more buys better materials and easier care, not more darkness.
The category is crowded, and sleep forums are full of people who have bought three cheap masks in a year. One long-term mask user summed the market up as cheap junk on one side and overpriced gadgets on the other. Another put the case for spending more plainly. They didn’t mind a high budget for a mask that was “legitimately good quality and will last a long time”.
That is the honest way to think about a luxury sleep mask. A £10 cotton mask that fits your face will keep you darker than a £60 silk mask that gaps at the nose. What the higher price should get you is a strap that keeps its tension and fabric that stays smooth after dozens of washes, ideally in a mask that also folds into a bag. If a premium mask can’t promise that, it isn’t worth the premium.
Which sleep mask suits which sleeper?
Match the mask to how and where you sleep. Side sleepers want thin and flexible, back sleepers can use any shape, shift workers need a reliable seal against daylight, and travellers want something that folds. Here is a verdict for each.
Side sleepers
Choose a thin, flexible flat mask with a flat strap and no bulky buckle at the side. As one forum user put it, thicker material “presses against the ears and temples, particularly with firm pillows”, and a firm pillow can push a structured mask out of place and open a gap. Our guide to choosing a sleep mask for side sleepers looks at pillow height and strap placement as well.
Back sleepers
Back sleepers have the widest choice, since nothing presses on the mask from the side. A contoured mask works well here if you dislike fabric on your eyelids, and a weighted mask stays settled because gravity is on its side. Pick on feel and seal.
Shift workers
Sleeping through daylight is the hardest test for any mask, because the light outside is far brighter than a streetlight. Choose a mask with a strap that holds its tension and run the torch test at the nose before your first day sleep. Our guide to a sleep mask for shift workers covers daytime routines and darkening the room.
Travellers
A flat silk or cotton mask folds into a coat pocket, while contoured foam takes up space and can crush in a bag. Cabin lights and early hotel sunrises are the usual problems, so pack something light that you can put on in seconds. Our guide to a travel sleep mask covers flights, trains and time zones.
Lash extensions
If you wear lash extensions, a contoured mask with raised cups is the usual choice, because it keeps fabric away from the lashes. A flat mask rests on them all night. Our guide to wearing a sleep mask with lash extensions explains what to check before you book your next infill.
Warm sleepers
Polyester satin traps heat, so warm sleepers usually do better with cotton or silk. Cotton is breathable and temperature-regulating, and silk takes up more moisture before it feels damp. A gel mask feels cold at first but warms up on the skin, so it suits a short cool-down better than a whole night.
Gifts
A sleep mask is a gift that suits almost anyone, and colour matters more than cut. Our guide to sleep masks for men and women covers sizing, colours and what to look for when you buy one for someone else.
When light and noise both wake you
Plenty of nights are broken by both: an early dawn and a snoring partner, or streetlight and traffic. A mask covers the light, and passive earplugs cover the sound. Our Life+ earplugs are reusable, hypoallergenic silicone with a passive SNR of 24 dB, German-tested and independently certified, at £29.95 for up to 100 uses. Alarms still get through because they are loud.
For a single set, our Deep Sleep Duo pairs the mulberry silk mask with Life+ earplugs, so light and sound are covered by one order. For the routine of using a sleep mask and earplugs together, see our dedicated guide, and for the earplug side alone, our hub on earplugs for sleeping compares fit and comfort for every sleeping position.
Do sleep masks actually help you sleep?
A sleep mask helps create darkness for sleep, and darkness supports the body’s natural melatonin release. What a mask does not do is change how your sleep is built. In a 2023 study using home sleep headbands, wearing a mask caused no change in sleep macrostructure.
That study, by Greco and colleagues in the journal SLEEP, is a useful reality check on marketing claims. A mask is a simple tool for a dark room, nothing more. If poor sleep carries on for weeks despite a dark, quiet and cool bedroom, it is worth talking to a GP.
Where does the Deep Sleep Mask fit, and where doesn’t it?
Our Deep Sleep Mask is a mulberry silk mask that is washable at 30 °C and costs £39.95, which puts it in the middle of the silk price band. It is made for total darkness. It suits some sleepers well and others not at all.
Measured against the five checks, the Deep Sleep Mask covers material, strap and washing in a way most silk masks don’t. It is 100% natural mulberry silk with no cotton. The adjustable Velcro strap won’t degrade or pull hair, the silk reduces friction on the skin around the eyes, and it goes in the machine at 30 °C in a laundry bag with the Velcro closed. It folds flat for travel, comes in one size and three colours (Navy Blue, Rose Quartz and Triple Black), and chilled in the fridge for 20 minutes it doubles as a cold compress for the eye area.
It is a good fit for light sleepers woken by early light, side and back sleepers who want a light silk mask, travellers, and anyone who wants silk that can go in the washing machine. It is not the right mask if you want the pressure of a weighted mask, or a gel mask that stays cold for hours. Free UK delivery applies over £35, and every order comes with a 40-day money-back guarantee, so you can run the torch test on your own face.
Before you order anything, try the torch test tonight with whatever mask you already own, or a folded scarf. Where the light leaks tells you which of the five checks matters most for your face, and that is a better guide than any price tag.
His connection to hearing protection stems from personal experience with sound sensitivity during live events and work in noisy environments, an issue that made him more aware of the long-term risks of unmanaged noise exposure. Today, as both a communicator and a user of BOLLSEN products, he is passionate about raising awareness around the importance of proactive hearing care.
At BOLLSEN, he develops data-driven marketing campaigns, writes SEO-focused articles, and manages communication channels that connect customers with practical knowledge about hearing protection. His work ensures that BOLLSEN’s message—prioritizing health, performance, and sustainability reaches a global audience in an engaging and trustworthy way.
Passionate about writing since childhood, Timotej combines creativity with a strong analytical approach, continuously testing new ideas in digital marketing, performance advertising, and social media. He believes in learning through innovation and collaboration, balancing leadership with openness to new perspectives.
Beyond his professional role, Timotej is committed to a healthy lifestyle and finds inspiration in fitness, sports, and quality time with friends. His personal passion for well-being aligns with BOLLSEN’s core values, making his work not only a career but also a cause he deeply believes in.
