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What does GSM mean on bedding?
In short
GSM means grams per square metre. It measures fabric or fibre weight. Higher GSM can feel denser. It does not tell you mattress spring support or overall quality by itself.
More detail
Use GSM to compare similar materials. Pair it with upholstery depth and core type when reading mattress labels.
Related searches: what does gsm mean · gsm fabric · upholstery depth mattress
Updated 2026-08-03. All answers