Feeling cold at night usually isn’t about how thick your duvet is, it’s about how well it traps and holds warm air against your body without letting it escape or making you overheat and kick the covers off. That distinction is why two duvets with the same tog rating can feel completely different once you’re actually in bed.
Why Down Duvets Work Better for Cold Sleepers
Down clusters, the soft plumage from geese or ducks, are naturally three-dimensional and trap far more air than flat synthetic fibres. More trapped air means better insulation for less weight. That’s also why down duvets tend to avoid the “too hot, then suddenly cold” cycle that happens with heavier synthetic duvets: down is breathable enough to release excess heat before you overheat, then insulate again once you’ve cooled slightly. For a cold sleeper, that steadier temperature matters more than raw thickness.
Goose down in particular has larger, more resilient clusters than duck down, which is why it’s generally considered the warmest natural filling available. If you want the detail on how the two compare, Hungarian goose down vs. regular goose down and duck down vs. goose down both go through the differences in warmth and price.
What Tog Should a Cold Sleeper Choose?
For most cold sleepers, 13.5 tog is the right starting point for winter. If your bedroom is heated overnight or you’re only mildly cold rather than always cold, 12 tog is a reasonable middle ground. Our full breakdown in what tog duvet you need for winter covers how to choose between tog ratings depending on your bedroom and heating, and the complete tog guide covers every rating from summer to winter if you want the full reference.
One thing worth knowing: going higher than 13.5 tog rarely helps as much as people expect. Past that point, a better fill (goose down over synthetic) or better-fitted bedding usually makes more difference than another jump in tog rating.
It’s Not Just the Duvet: Sizing Matters
A duvet that’s too small for your bed lets cold air in along the edges no matter how warm the filling is, which is one of the most common reasons people feel cold despite owning a “warm enough” duvet. If you’re not confident your current duvet is the right size for your bed, our duvet size guide and king vs. super king comparison will help you check before you buy a warmer one you don’t need.
Pillows matter too. A feather and down pillow retains warmth around your head and shoulders in a way that firmer synthetic pillows generally don’t. If you’re a cold sleeper and haven’t reconsidered your pillow in a while, it’s worth pairing with the duvet upgrade.
Other Small Changes That Help Cold Sleepers
A warmer duvet does most of the work, but a few other things compound the effect:
- A cotton mattress protector adds a light layer of insulation beneath you, not just protection, and stops the mattress itself from feeling cold against your skin.
- Percale or sateen sheets in a higher thread count feel warmer against the skin than thin, worn bedding. Our percale vs. sateen comparison covers the differences if you’re deciding between the two.
- Switching your duvet on time. Moving to your winter duvet before the cold actually sets in, rather than after a few uncomfortable nights, makes the transition less noticeable. See when to switch to a winter duvet for timing.
Frequently Asked Questions
Why am I still cold with a high tog duvet?
The most common reasons are duvet size (cold air getting in at the edges), fill type (synthetic fillings trap less air per gram than down at the same tog rating), or a mattress and sheets that aren't insulating you from below. Check sizing and fill before buying an even higher tog rating.
Is goose down actually warmer than duck down?
Goose down generally has larger, more resilient clusters than duck down, which trap more air and provide better insulation for the same weight. Duck down is typically a more affordable alternative and still performs well, just with a slightly lower warmth-to-weight ratio.
What tog is best for someone who's always cold?
13.5 tog is the standard recommendation for consistently cold sleepers in a UK winter. If you're cold even in spring and autumn, a combination duvet that lets you layer up beyond 13.5 tog on the coldest nights is worth considering.
Do heavier duvets keep you warmer?
Not necessarily. Warmth comes from trapped air, not weight. A lightweight goose down duvet can be considerably warmer than a heavier synthetic duvet at the same or even higher tog rating.
Can a mattress protector make a difference to how warm I feel?
Yes, a cotton mattress protector adds a layer of insulation beneath you and stops heat escaping into the mattress, which is particularly noticeable in a cold bedroom.
Shop our goose down duvets or read about the benefits of investing in a goose down duvet before you choose.
