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What does TOG rating mean on a duvet?
In short
TOG (Thermal Overall Grade) measures thermal resistance of a duvet: higher TOG means greater insulation. One TOG equals 0.1 m²·K/W under standard test conditions.
More detail
TOG describes insulation, not fill quality or weight alone. Compare TOG within the same product category.
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Updated 2026-08-03. All answers