2
FIDDAA Sleep Eye Mask
★★★★☆ 4.0
- Long established, genuinely premium silk and finish
- Roughly two-and-a-half times the price for no better blackout
- Weak price-to-performance next to the winner
For side sleepers · 2026 · Blackout & travel
The best silk sleep mask, ranked.
Twenty masks, weeks of real nights, and one that actually blocks every scrap of light and stays put when you turn onto your side. Here’s the shortlist, and why the top pick wins.
See our #1 pick ›- ✓100% mulberry silk — the winner
- ✓20 masks bought at retail
- ✓40-day money-back on the winner
- ✓Updated 2026
BOLLSEN Deep Sleep Mask100% mulberry silk · contoured for side sleepers
£39.95RRP100% silk★★★★★ 4.8
The only mask in our test that blocked every scrap of light and still felt like nothing when we turned onto our side. Soft silk, no pressure on the eyes, and a strap that doesn’t tug your hair.
- Blocks 100% of light — no gap at the nose where standby LEDs and dawn get in
- Soft mulberry silk sits flat against the face, so it doesn’t press the eyes when you sleep on your side
- Temperature-regulating silk stayed cool all night, where foam and polyester masks trapped heat
- Adjustable strap that won’t pull your hair or go slack · washable at 30°C · folds flat for travel
- Costs more upfront than a cheap polyester mask · often sold out
✓ Free UK / EU shipping today · 40-day money-back
Why it matters
A thin line of light from a gap in the curtains, a standby LED, the early summer dawn, any one of them is enough to keep you surfacing. A mask only earns its place if it blocks all of it and stays comfortable enough to keep on till morning.
That is where most of them fail. Cheap masks leave a gap at the nose that lets a wedge of light straight in, press on your eyes the moment you turn onto your side, or run so hot you take them off at 3am. So we scored on the two things that decide whether a mask actually works: does it block every scrap of light, and is it still comfortable when you are lying on your side?
Why do most masks let light in?
The weak point is the bridge of the nose. A flat panel of fabric leaves a small triangular gap there, and that gap is all it takes for dawn or a charging light to reach your eyes.
The winner is contoured to seal against the nose and cheekbones, so there is no gap for light to find, and the silk sits flat enough that side sleepers do not feel it pressing on the eyes.
Contoured to seal against nose and cheekbones — no gap for light to find.
See our #1 pick ›The review
Across weeks of real nights, the BOLLSEN Deep Sleep Mask was the only one our testers kept on till morning without pushing it up onto their forehead.
The best mask is not the one with the fanciest contour. It is the one that blocks the light and you forget you are wearing.
True blackout, no gap at the nose
The mask is shaped to seal against the bridge of the nose and the cheekbones, so the triangular gap that lets light into most flat masks simply isn’t there. Testers reported total darkness even with a bedside charger glowing and the curtains not quite closed.
Comfortable on your side
Soft mulberry silk sits flat against the face rather than pressing into the eye sockets, so it does not dig in when you turn onto that side. The strap is a wide, adjustable band that holds position without tugging hair or leaving a mark.
Cool, washable and built to last
The silk is naturally temperature-regulating, so it stayed cool where foam and polyester masks trapped heat, and it is hypoallergenic for sensitive skin. It washes at 30°C, folds flat for a carry-on, and is backed by a 40-day money-back guarantee.
Blocks every scrap of light, and still feels like nothing on your side.
See our #1 pick ›The rest of the field · 2–5
3
Sleep&Glow Silk Mask
★★★★☆ 3.8
- Contoured design, widely available
- No UKCA or CE marking found on the product
- Deep contour is bulky to lie on for side sleepers
4
Manta Sleep Mask
★★★★☆ 3.7
- Modular eye cups, helpful customer service
- Bulky over-ear cups; some testers found they pressed and irritated
- Fiddly to position, and the cups sit awkwardly for side sleepers
5
Traumkoala Sleep Mask
★★★☆☆ 3.5
- 3D contour blocks light reasonably well
- Runs hot; the synthetic fill traps heat
- Strap works loose overnight; patchy availability
The winner
BOLLSEN Deep Sleep Mask
The only mask that blocked every scrap of light and still felt like nothing when testers turned onto their side.
| Scored on | Deep Sleep | FIDDAA | Sleep&Glow | Manta | Traumkoala |
|---|---|---|---|---|---|
| Total blackout | ✓ | ~ | ~ | ~ | ~ |
| Comfortable on your side | ✓ | ~ | ✗ | ✗ | ~ |
✓ met · ~ mixed · ✗ missed — scored on the pros and cons inside each card above; tap a card to open it.
See our #1 pick ›Method
How we tested
20masks, bought at retail — not sent by brands
4wkof real nights, side and back sleepers
2things scored: total blackout, comfort on your side
Every mask was bought at full retail. Testers scored each on whether it blocked all light with no gap at the nose, and whether it was still comfortable when lying on their side. Nothing here was supplied by a manufacturer.
What buyers say
Karin B.★★★★★Verified buyer
“Completely comfortable to wear, no pressure even as a side sleeper. I am genuinely won over.”
Anna★★★★★Verified buyer
“Comfortable and effective. This silk mask really has improved how I sleep. The material feels good against the skin and the design blocks out every bit of stray light. I sleep far more deeply and wake up refreshed.”
Elisabeth Baur★★★★★Verified buyer
“A very comfortable mask. Great material and easy to wear — you barely notice it. Genuinely very good.”
Customer reviews from BOLLSEN · translated from the German store
Questions
Before you buy
Does it really block all the light?
That was half the test. The seal closes the gap at the nose, which is where standby LEDs and early daylight get in on most masks. Every mask here blocks light to a degree; this was the one that left no gap.
Can I lie on my side in it?
That was the other half, and it is where the contoured masks came unstuck. The Sleep&Glow contour is bulky to lie on and the Manta eye cups sit awkwardly and pressed on some testers. Mulberry silk sits flat against the face instead.
Will it be hot?
Silk is temperature-regulating and stayed cool across a full night. Traumkoala was the one that ran hot, because the synthetic fill traps heat.
£39.95, when a polyester mask is a few pounds?
Polyester traps heat and cheap straps go slack. At the other end, FIDDAA is roughly two-and-a-half times this price for no better blackout, so the spread here runs in both directions.
Will the strap pull my hair or go loose?
The strap adjusts and holds without snagging. Traumkoala’s was the one that worked loose overnight in our test.
Can I wash it?
Yes, at 30°C. It also folds flat for a bag, so it travels without creasing into a shape you cannot use.
What if it does not suit me?
There is a 40-day money-back guarantee, so you can judge it over a run of real nights rather than one.