Sleep glossary
blackout blinds
Updated
They work best when measured and fitted carefully to limit edge gaps.
Plain-English definition
Blackout blinds are window coverings designed to reduce incoming light through a window.
They work best when measured and fitted carefully to limit edge gaps.
Why it matters
For bright bedrooms, a room-level change may be better than relying only on a sleep mask.
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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