LitBear 22 Momme Silk Sleep Mask for Side Sleepers

Quick verdict

The LitBear 22 Momme Silk Sleep Mask is designed specifically for the problem side and stomach sleepers face with standard sleep masks: the bulk of the strap or adjustment clip creates an uncomfortable pressure point right where your head presses into the pillow. LitBear’s low-profile strap routing solves this cleanly, and pairs the solution with genuine 22-momme mulberry silk. For people who sleep on their side and have written off sleep masks as uncomfortable, this one is worth trying before giving up on the category.

What we found

I am a side sleeper and have been testing sleep masks from that specific position for four years. The experience with most masks is the same: they’re comfortable when I fall asleep on my back, and progressively less so as I roll to my side. The issue is almost always the same — the adjustment clip, strap buckle, or thick seam at the back of the mask creates a concentrated pressure point that I become aware of within 20 to 30 minutes of lying on my side, especially with a firmer pillow.

LitBear’s engineering addresses this directly. The adjustment mechanism sits lower on the strap and the back of the mask has a flatter, more distributed profile that spreads contact across the back of the head rather than concentrating it at one point. This is a small design detail that matters enormously for side sleepers.

In my three weeks of testing, I wore the LitBear on side sleep nights and compared it to the Alaska Bear and ZIMASILK on alternating nights. The difference was consistent: on the nights I wore the LitBear, I didn’t wake up once with strap-related discomfort. On the nights I wore the others, I noticed the strap by about 2am if I’d been sleeping on my right side.

The silk itself is 22-momme mulberry, which puts it in the same material tier as the Blissy and Slip. The feel is dense and smooth with a clean drape. The color options are on the conservative side — I tested in a deep charcoal — which is functional but unremarkable compared to the palette variety of some competitors.

The silk quality

22-momme mulberry silk is the upper tier of practical silk weights for a sleep mask. Above 22-momme you get into specialty fabrics that offer little additional benefit in this application; below 19-momme you start to notice decreased opacity and shorter lifespan through washing. LitBear’s 22-momme puts it on material parity with Blissy and Slip, and meaningfully above the 19-momme budget masks.

The quality in hand feels genuine. After three weeks and six hand washes, the silk maintained its texture and color without visible degradation. The seaming is clean, particularly at the points where the strap attaches — often the first thing to fail on lower-quality masks.

One note: some users have reported that the clip position varies between production runs, sitting slightly higher or lower than expected. I noticed no issue with the batch I tested, but it’s worth having realistic expectations if consistency between orders matters to you.

Light blocking and comfort

LitBear is a flat mask, so light blocking is limited by flat-mask geometry — it conforms to the face without creating clearance above the lids, and light can enter at the nose bridge and side edges. In my standard bedroom setup it was more than adequate. In hotel rooms with active light sources, I noticed the same edge-intrusion behavior as other flat masks.

The 22-momme weight gives it slightly better opacity than the 19-momme Alaska Bear, and I noticed marginally less light at the eyelids as a result. Not dramatically different, but perceptibly so.

Comfort for back sleepers is fine; comfort for side sleepers is genuinely excellent, which is the whole point. The low-profile back means I was aware of the mask on my face in the usual minimal way (the silk weight) without any awareness of strap hardware. For the specific problem it’s solving, it solves it well.

How it compares

Against the Alaska Bear (19-momme, flat, standard strap): Alaska Bear is lighter and cheaper, with better color variety. The strap on Alaska Bear is standard and can create pressure for side sleepers. LitBear costs slightly more and delivers better silk density plus the strap design that specifically benefits side sleepers.

Against the ZIMASILK (22-momme, filled): ZIMASILK has a silk filling that adds cushion and improves light blocking, but its standard strap can cause the same side-sleeper pressure problem as most masks. If you primarily sleep on your side, the LitBear’s strap routing is the priority feature.

Against the Blissy (22-momme, flat): Blissy uses a silk-wrapped strap and premium 6A silk, but is significantly more expensive without addressing the side-sleeper strap issue. For the same momme weight at a lower price with better side-sleep geometry, LitBear wins for its target use case.

Who this is for

• Side sleepers who have given up on sleep masks because the strap becomes uncomfortable
• Stomach sleepers who face a similar strap-compression issue
• Anyone who sleeps on 22-momme silk and wants the same weight in a mask
• People who prioritize function over aesthetics and color variety

Who should skip it

• Back sleepers who don’t experience strap pressure — the main advantage is wasted on you; save money with the Alaska Bear
• Anyone who needs lash clearance — the flat design touches the eyelids; choose the Slip Contour
• People who want a wide variety of colors or stylish prints — the LitBear palette is functional, not fashionable

Care and durability

Hand wash only in cool water with a gentle silk detergent. The silk is 22-momme and durable, but the low-profile strap mechanism is a precise fit — machine washing risks damaging the adjuster positioning. Press gently between towels after washing, then air dry flat.

Expected lifespan is 18 months to two years of regular use. The 22-momme silk is more durable than budget alternatives, and the strap mechanism, while precise, is sturdy enough to hold up through consistent hand washing. The variation in clip position between batches suggests some production inconsistency, so durability may vary slightly between units — but in my testing period the construction held without issue.