SILAIRA · Momme guide
22 Momme is a fabric-weight specification.
Using the common conversion of 1 Momme ≈ 4.34 g/m², 22 Momme is approximately 95 g/m². It is not a silk grade, certification, thread count, or complete product-quality score.
The useful equation
22 × 4.34 ≈ 95 g/m²
Use the number in context.
What it measures
Momme compares the mass of silk fabric per unit area. A higher Momme number means a heavier silk fabric per unit area.
What it does not prove
The number does not identify silk grade, origin, fiber length, weave, certification, finished-product durability, fit, care, or light coverage.
How to use it
Compare Momme together with fiber content, the product surfaces it applies to, construction, dimensions, care instructions, realistic limits, and evidence.
19, 22, and 25 Momme are weights, not a ranking.
- 19 Momme: approximately 82 g/m².
- 22 Momme: approximately 95 g/m².
- 25 Momme: approximately 109 g/m².
A heavier fabric is not automatically a better finished product for every use. Fiber, weave, construction, comfort, care, and the product’s purpose still matter.
Claims to check carefully.
“Premium” or “Grade 6A”
22 Momme only states fabric weight. If a seller mentions a grade, the claim needs its own definition and evidence. Momme does not prove silk grade.
“OEKO-TEX” or another certification
A certification claim should be supported by the relevant certificate, scope, and product identification. Momme does not prove safety, environmental testing, or certification.
“Full blackout”
Momme does not establish complete light blocking. For a sleep mask, coverage depends on shape, layers, nose area, edge profile, strap tension, face shape, and fit.
Skin, temperature, or durability claims
Momme describes fabric weight. Skin feel, heat and moisture behavior, comfort, snagging, storage, washing, and durability depend on additional materials, construction, care, use, and separate evidence.
A specification is useful when a brand explains both what it means and what it does not prove.
How to compare a 22 Momme silk sleep mask.
- Confirm the exact fiber statement. Check the fiber and the product parts it applies to.
- Check both outer surfaces. The outward-facing side and the face-facing side may use different materials.
- Review construction. Compare dimensions, edge profile, nose area, layers, filling, stitching, and strap design.
- Read product-specific care. The complete product may need different care from a flat fabric sample.
- Look for realistic limits and evidence. A useful product page says what is not promised and supports claims with specifications, photographs, reports, or certificates where relevant.
Confirmed SILAIRA Ensō details
The Momme number is only one part of the mask.
- Fabric weight: 22 Momme.
- Surfaces: silk on both outer surfaces, including the face-facing side.
- Filling: 100% mulberry silk filling.
- Size: 20.5 × 9 cm, approximately 8.1 × 3.5 in.
- Weight: approximately 28 g.
- Strap: fixed elastic; not manually adjustable.
- Light coverage: designed to help reduce distracting light; no complete-blackout promise.
View current Ensō product details →
Frequently asked questions.
Does 22 Momme mean 22 grams?
No. Momme is a silk fabric-weight unit, not the finished product weight in grams.
Does “mm” mean millimeters here?
No. In a silk specification, mm can abbreviate Momme. It does not mean the fabric is 22 millimeters thick.
Is 25 Momme automatically better than 22 Momme?
No. It is heavier per unit area. Whether that is preferable depends on the product and your priorities.
Does a higher Momme number prove better durability?
No single number proves finished-product durability. Fiber quality, weave, construction, stitching, care, use, and storage also matter.
Sources.
- CAMEO, Museum of Fine Arts Boston: Momme
- United Nations Digital Library: source and conversion for Momme
- SILAIRA Ensō product specifications
Related SILAIRA guides.
Reviewed by the SILAIRA Editorial Team
Fact-checked against current SILAIRA product specifications
Updated August 30, 2026