You may never find the "100% blackout" sleep mask you're looking for, but this guide will help you find the one that comes closest for you. The reason why 100% blackout is impossible is that there's no single mask suits every face, every pillow, and stays fully dark through every turn of the night.
The best blackout sleep mask does three things: its material blocks the light, its edges close the gaps around your nose and cheeks, and both hold after you roll over. Many masks manage one or two, and people notice. One r/sleep thread asks, "Does anyone actually manage to keep a sleep mask on overnight?"
Three Layers of Darkness: Material, Edges, and Staying Power
Layer 1: Does Light Pass Through the Mask?
Textile light-blocking tests, such as AATCC TM148, measure how much light passes through the fabric itself. Construction matters as much as color. A study of woven cotton found that weave, density and dye all affected how much light got through. So a blackout fabric is the easiest layer to get right, and the easiest to check by looking at layers and linings. But it only describes cloth, not a finished mask on a face.
Layer 2: Does Light Get Around It?
Most leaks happen at the edges. One Mumsnet side sleeper described her mask as comfortable but still noticed a small gap near her nose. In an r/sleep thread about the Manta, some commenters reported light leaks and pressure while others got complete darkness after adjusting. Edge fit varies by face and by model, and a fabric that blocks light can still glow around the nose.
Layer 3: Does the Darkness Last When You Move?
A mask that is dark while you lie still may not be dark after you turn. One r/sleep commenter said their mask blocked light at first but moved once they lay on their side. A Nodpod owner on r/BuyItForLife liked its weighted feel but wouldn't choose it for a restless night because it struggled to hold position. In both cases the darkness was fine at first, and the trouble started once the sleeper moved. That's why this layer depends on two things working together. If a mask is uncomfortable, you end up pulling it off or fidgeting with it, and the darkness goes with it. If it's comfortable but drifts, you lose the darkness anyway. Staying dark all night takes a mask you can leave on and one that stays where you put it.
So you probably won't find a mask that is 100% blackout in every condition. Look for one that is strong on all three layers. That's roughly how Which? tests: it rates fabric light blocking separately from comfort and fit, and has testers move around to see whether masks stay put.
What to Check Before You Buy a Blackout Sleep Mask
Start With the Fabric
If you're shopping online, look for multiple layers, an opaque lining or a dedicated blocking layer. Dark, thick fabric is a good clue, but it doesn't prove anything on its own. In reviews, pay attention to whether people say light comes through the fabric or leaks at the nose, and trust details that come up again and again more than a star average. If you can try it on, sit in a dim room with your eyes open and see whether the glow comes through the cloth or around it.
Look at the Shape Around Your Nose and Eyes
Check how far the mask reaches above, below and beside the eyes, and what it does at the nose bridge, whether that's a contour, a flap, a soft edge or adjustable cups. WIRED's buying guide also points to nose fit and adjustment hardware as things to look at. In person, notice whether you need to press the mask with a hand to close a gap, because a mask that only works while you're holding it won't hold up once you're asleep.
Think About How It Stays Put
Some masks start by simply resting on your face, so it relies on your position. Add a strap and you get a second way to hold: the band pulls the mask against your skin so it can move with your head. Some designs go further and wrap around the whole head with a stretch fit, spreading the hold to a larger area. Online, look for reviewers who sleep the way you do; this side-sleeper thread shows how differently the same designs behave against a pillow. Notice how often they readjust and whether the elastic loosens. In person, lie on your side with your usual pillow. We cover this more in our guide to masks that keep falling off.
Be Specific About Comfort
A comfortable sleep mask comes down to small things: a narrow strap that presses, a buckle against the pillow, fabric or cups touching around your eyes, pressure when you lie on your side, and how much wrap and weight you like. Sleep Foundation suggests side sleepers check where the adjusters will sit between head and pillow. And a review that says how long someone wore a mask, and why they adjusted it or took it off, tells you more than "so soft."
Five Types of Blackout Sleep Masks, Compared
| Type (example) | Coverage | Stays on by | Nose and edges |
|---|---|---|---|
| Flat soft (Slip) | Fabric over the eyes | Back strap | Drape of the fabric |
| Contoured cups (Manta) | Cups around the eyes | Adjustable strap | Repositionable cups |
| Padded silk (Drowsy) | Wide padded silk | Adjustable strap | Soft padded edges |
| Weighted (Nodpod) | Weighted pad | Strapless, end tucks into a slit | Weight on the face |
| Sleep hood (Beside) | Head, eyes and ears | Stretch fit, no rear strap | Curved edge at nose and cheeks |
Flat Soft Masks: Slip Silk Sleep Mask
Slip's Pink Sleep Mask uses slipsilk fabric with a silk filler and an internal liner, a solid answer to the material layer. The other two layers are where a flat mask is most exposed. With no cups or contouring of its own, the seal at your nose and cheeks depends on how the fabric drapes on your face, and it holds only as well as its strap does once you turn onto a pillow.
Contoured Masks: Manta Sleep Mask
The Manta Sleep Mask goes after the edge layer directly, with eye cups you can reposition and an adjustable head strap. That gives you a way to close gaps, and it also leaves the result up to your tuning. In one r/sleep thread, commenters split between light leaks and pressure on one side and full darkness after adjusting on the other. Staying power then depends on how the cups and strap sit against your pillow when you're on your side.
Padded Silk Masks: Drowsy Silk Sleep Mask
Drowsy describes double-padded silk with full coverage, and retailer listings add an adjustable head strap. Padding softens the edge against your face and can help close small gaps, so it covers the first two layers reasonably well. The third is the open question: some reviewers said it comes off once or twice a night and they put it back without fully waking, which means the darkness doesn't always last.
Weighted Masks: Nodpod Weighted Sleep Mask
Nodpod says its mask isn't meant to stay on all night, and its strapless design includes a slit for tucking in the end. A Nodpod owner on r/BuyItForLife described the same limit on restless nights. Staying power is the stated trade-off, so it fits darkness while you fall asleep better than darkness through the night.
Sleep Hoods: Beside Weighted Sleep Hood
The Beside Weighted Sleep Hood is the one design here where all three layers come from a single structure.
Material. The hood uses a four‑layer construction: two inner light‑blocking layers and two soft, skin‑facing layers. In an internal light test conducted at midday, this setup blocked more than 99.9% of incoming light at the fabric level. The readings beneath the hood were 1.3 lux at the eye area and 1.9 lux at the nose area.
Edges. The hood has closed crown and full wrap around your eyes and ears, which means there are no open edges above or beside the eyes for light to slip through. Below the eyes, the opening follows the natural line from under‑eye to cheek, with a curved section that sits along the bridge of your nose to cover the spot. That fixed shape is the seal, so once you seat it around your nose and cheeks there’s simply less edge left for light to find.
Staying power. The hood stays on by covering more of your head. A stretch fit grips a wide area of hair and skin, so the hold is spread out. That extra contact creates more friction with your pillow, which keeps the hood moving with you. In a small test, 36 sleepers whose masks had come off during sleep wore the hood for one night, and 92% said it did not fall off. If you can’t try it on, you can measure your head and pick M or L size according to the official guide.
Putting the Three Layers Together
Each of these masks answers at least one layer well: Slip with its lined fabric, Manta with adjustable cups, Drowsy with padding, Nodpod with weight. In each case the other layers are left to your fit or your pillow. The sleep hood is the only design here that builds material, edge seal and staying power into the same structure. That doesn't mean 100% blackout, because no mask can. But if complete darkness that lasts matters most, a hood is where you'd start.
FAQ
Can a sleep mask really give 100% blackout?
For one person under the right conditions, yes. No mask does it for every face and sleeping position, because light can enter through the material, around the edges, or after the mask shifts.
Why does my sleep mask leak light around the nose or when I turn over?
A nose leak usually means the bridge shape doesn't match your face. A leak after turning means the pillow pushed the mask or the fixation loosened. Look for nose contour or cups, and for reviewers who sleep in your position.
Do weighted sleep masks block more light?
Not by themselves. Blackout comes from material and edge fit; weight changes how a mask feels and may affect how it sits, which is a separate question.
What's the best sleep mask for travel ?
The same three layers apply. On a plane or in a car, you can't adjust your pillow, so staying power matters more.
What is a sleep hood, and how is it different from an eye mask?
A sleep hood covers the whole head instead of just the eyes (Beside's covers eyes and ears) and holds by stretch rather than a separate rear strap. That design leaves fewer places for light to slip in at the edges, though fit by size still matters.
If you'd like to see how a different structure handles all three layers, the Beside Weighted Sleep Hood is $40, with $5 off your first order and a 30-night trial.