Blissy 100% Mulberry Silk Sleep Mask

Quick verdict

The Blissy Silk Sleep Mask is the best flat silk sleep mask for people who want the finest material grade available and are willing to pay for it. The 22-momme, grade-6A mulberry silk is denser and smoother than the vast majority of masks on the market, and the construction quality reflects the same textile obsession that made Blissy’s pillowcases famous. It’s a flat mask, so it won’t give you the no-contact eye clearance of the Slip Contour, but for pure material quality in a flat form factor, this is as good as it gets.

Our take

Blissy’s background is silk pillowcases, and that context explains why the mask leads with its material before anything else. The brand specifies 22-momme, grade-6A mulberry silk, a clear step up in density from the 19-momme silk most budget masks use — a difference in the textile itself, not just in the price. Heavier silk has more substance, yet a flat, unfilled mask like this still adds very little weight over the eye area.

Blissy positions this mask for home, hotel and travel use, and the specification supports that. 22-momme mulberry silk breathes and stays closer to skin temperature than foam or polyester, which matters most on long flights in dry, recirculated cabin air. Silk’s smooth surface also drags on skin less than cotton or foam, so it’s less likely to leave crease marks after a long wear.

The strap is a silk-covered elastic band with no buckle or slider, and unlike most competitors, Blissy uses silk on the outside of the strap as well. This means the part of the mask that rests against your hair is also silk, which reduces the hair friction and frizzing that other masks cause. The trade-off is that the strap isn’t adjustable: it relies on the elastic’s stretch, so it suits most heads but can feel loose on smaller ones or snug on larger ones.

Packaging is a bigger part of the pitch here than with most masks on this list. Blissy presents it in a coordinated gift box with a drawstring pouch that doubles as storage. If you’re buying this as a gift, you won’t need to wrap it. If you’re buying it for yourself, the storage pouch keeps the silk protected between uses.

The silk quality

Blissy specifies their silk as 22-momme, grade-6A mulberry silk. Mulberry silk is the gold standard of commercial silk, produced by Bombyx mori silkworms fed exclusively on mulberry leaves. The 22-momme weight is toward the high end for sleep masks — most budget options run 19-momme, and economy alternatives can go lower. Higher momme means more silk threads per unit area, which translates to greater opacity and durability.

Grade 6A is the top tier of the commercial silk grading scale, indicating long, even filaments with minimal variation. It’s worth noting that silk grading isn’t independently certified by any international standard body — it’s self-reported by suppliers. So treat “6A” as the brand’s own description; the 22-momme weight is the more concrete part of the spec.

The mask is also OEKO-TEX certified, which means the silk and dyes have been tested and certified as free from harmful chemicals. That certification is independently verified and worth noting for anyone with sensitive skin.

The 22-momme density is the material quality you’re paying for — not just the initial feel, but more fiber to stand up to repeated washing.

Light blocking and comfort

The Blissy is a flat mask, which means light blocking is fundamentally limited by how well a flat sheet of silk can conform to the contours of your face. Like any flat mask, it covers the center of the eyes well and is most likely to let thin slivers of light in at the sides and nose bridge. The dense 22-momme weave helps with opacity, so in a bedroom that’s already dark apart from some ambient street light, it’s a strong choice. In a hotel room with a bright gap under the door, expect some light at the edges.

Comfort is where the specification points. Silk is breathable, naturally thermoregulating and gentle on skin, so it’s less likely to leave marks than foam, and it doesn’t hold a crease the way foam does. It’s also quiet: silk against a silk pillowcase makes almost no sound when you move, unlike some synthetic satins.

How it compares

Against the Alaska Bear (19-momme, flat): Alaska Bear offers genuine mulberry silk at a budget price. The material quality difference between 19 and 22 momme is real but subtle in any single night — you feel it more in long-term durability and opacity. If you’re buying your first silk mask, start with Alaska Bear. If you’ve used it and want a meaningful upgrade, Blissy delivers it.

Against the Slip Contour (22-momme, contoured): Both use premium mulberry silk. The Slip’s 3D cups lift the silk off your eyelids, which matters for lash extensions and eye cream. If you need that clearance, choose the Slip. If you prefer a flat mask — which most people do for travel and stomach sleeping — Blissy matches the Slip’s silk quality without the bulkier form factor.

Against the Umisleep (22-momme, flat): Umisleep claims the same material specification at a lower price and is the most direct competitor. Blissy wins on brand track record and the silk-wrapped strap construction. Umisleep wins on price-to-spec ratio. Both are legitimate choices at this material tier; Blissy commands a premium for its track record.

Who this is for

• Silk pillowcase users looking for a matching mask from the same brand
• Anyone buying a gift for someone who treats their sleep seriously
• Side sleepers and stomach sleepers who prefer a flat mask to a contoured one
• Hot sleepers who have found foam masks uncomfortably warm
• People who want the best available flat silk option regardless of price

Who should skip it

• Anyone who needs eye clearance for lash extensions — choose the Slip Contour instead
• Budget shoppers — the Alaska Bear delivers most of the material benefit at a fraction of the cost
• People who need absolute blackout — no flat mask achieves that; supplement with blackout curtains

Care and durability

Blissy’s Amazon listing gives machine wash as the care method. If you use the machine, choose a cold delicate cycle, put the mask in a mesh laundry bag, and skip the dryer. Hand washing in cool water with a gentle, fragrance-free silk detergent is the gentler option and takes only a few minutes. Either way, don’t wring or twist it: press it in a dry towel to remove water, then lay it flat to dry away from direct sunlight.

The 22-momme density means more fiber per square inch, which generally holds up better through repeated washing than lighter alternatives. Gentle washing also protects the strap seams, which take the most stress on any mask.