Tog ratings for duvets
A 'tog' is an industry standard name used for measuring the warmth of a duvet. The higher the tog rating, the warmer the duvet though the tog doesn't represent how heavy, light or thick the duvet may be. Lightweight duvets can insulate your body from the cold just as effectively as heavier ones. This is because some duvet fillings are better insulators than others.
Togs are measured in units of thermal resistance. For example, if a duvet had a tog rating of 4.5 then it would be more appropriate to be used in the summer months. At the other end of the scale, duvets with a tog rating of 13.5 or higher would be used in the colder months of the year.
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