So I’m not sure if you knew (I didn’t either), but duvet togs range from 3.5 to 15. Which seems like quite a hefty increase really. And how do we know which togs are meant to be for which seasons. Well, I found that out throughout my research! So here it is…
3.5 - 7.5 Should be used in the Summer
7.5 - 10.5 Should be used throughout Spring/Autumn
13.5 - 15 Should be used in the Winter
So now we know what tog we should be using, what actually are they? The tog refers to the level of thermal insulation. So the lower the tog, the less insulation, the higher the tog the more insulated the duvet. So it makes sense really, the higher the tog, the warmer you will be.