The tog rating of a duvet tells you how warm it will be on a scale of 2.5 to 15. A 4.5-tog duvet might keep you warm in summer, but a 13.5-tog duvet is better for winter. Some find it more pleasant to use a 10.5-tog duvet all year. Partner duvets If you and your partner can’t agree on the tog rating, try a split-tog duvet. These have different amounts of filling on each side, so you should both be comfortable.

Source: The Times November 19, 2017 00:05 UTC