Sleep glossary
memory foam
Updated
It can feel contouring and stable, but some people find it warm or slow to respond.
Plain-English definition
Memory foam is a pressure-sensitive foam that slowly changes shape under weight and warmth.
It can feel contouring and stable, but some people find it warm or slow to respond.
Why it matters
For pillows and masks, memory foam feel should be balanced against heat, loft, cover, and return policy.
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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