Sleep glossary
blackout mask
Updated
Fit around the nose, strap pressure, and side-sleeper bulk often matter more than fabric claims.
Plain-English definition
A blackout mask is a sleep mask designed to reduce light reaching the eyes.
Fit around the nose, strap pressure, and side-sleeper bulk often matter more than fabric claims.
Why it matters
Light leaks can make an otherwise premium mask feel ineffective.
Buying relevance
Use this term as a practical buying clue, then check the current manufacturer wording, setup guidance, materials, and returns policy. It should not be treated as a medical claim or a guarantee of how a product will work for you.
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