Choosing a duvet sounds simple until you’re faced with different tog ratings, fillings and seasonal options. Suddenly, what should be an easy decision can feel surprisingly confusing.
Quick Answer
The right duvet depends on two things: how warm you like to sleep and how warm your bedroom is. Tog tells you how insulating a duvet is, while the filling affects how it feels, breathes and regulates temperature.
A higher tog doesn’t automatically mean a better duvet, and the warmest option isn’t always the most comfortable one. Some people naturally sleep hot, others feel the cold, and the same duvet can feel completely different from one bedroom to another.
The filling matters too. Natural fillings such as feather, down and wool tend to feel very different from synthetic fibres, and each has its own advantages when it comes to warmth, weight, breathability and care.
In this guide, we’ll explain what duvet tog actually means, which tog works best for each season, the difference between natural and synthetic fillings, and how to choose a duvet that suits the way you sleep.
What Does Duvet Tog Mean?
A duvet’s tog rating tells you how well it insulates and retains warmth. The higher the tog, the warmer the duvet is designed to feel.
Tog doesn’t tell you how thick, heavy or high-quality a duvet is. Two duvets can have the same tog rating but feel completely different depending on the filling, construction and fabric used.
The Simple Way to Think About Tog
Lower tog
Lighter insulation, usually more suitable for warmer bedrooms and summer months.
Medium tog
A useful middle ground for spring, autumn and many year-round sleepers.
Higher tog
More insulation, usually better suited to colder bedrooms and winter.
One Thing to Remember
Don’t choose your duvet based on tog alone. Your bedroom temperature, whether you naturally sleep hot or cold, and the filling inside the duvet all matter too.
What Tog Duvet Do You Need?
The right duvet tog usually changes with the seasons, but there isn’t one perfect number for everyone. Your bedroom temperature and whether you tend to sleep hot or cold matter just as much as the time of year.
Duvet Tog Guide by Season
| Tog Rating | Best For | Typical Season |
|---|---|---|
| 2.5–4.5 Tog | Warmer bedrooms and people who naturally sleep hot. | Summer |
| 7–10.5 Tog | A useful middle ground as temperatures begin to change. | Spring & Autumn |
| 10.5–13.5 Tog | Cooler bedrooms and sleepers who prefer more warmth. | Winter |
| All Seasons | People who want one flexible duvet setup throughout the year. | Year-round |
An All Seasons duvet is usually made from two separate duvets that can be used individually in warmer weather and fastened together when you need more warmth. It can be a practical option if you don’t want to store several different duvets throughout the year.
Our Advice
Use the tog rating as a starting point rather than a strict rule. If your bedroom stays warm in winter, you may not need a very high tog. Likewise, if you feel the cold easily, you might prefer a warmer duvet earlier in the year.
Natural vs Synthetic Duvet Fillings
Once you’ve decided on the right tog, the next thing to think about is what’s actually inside the duvet. The filling affects how warm, light, breathable and easy to care for it feels.
Broadly speaking, duvet fillings fall into two groups: natural and synthetic.
| Filling Type | What It Feels Like | Good For |
|---|---|---|
| Feather & Down | Soft, lofty and warm without necessarily feeling overly heavy. | People who like a traditional, cosy duvet feel. |
| Wool | Warm, breathable and naturally good at managing temperature and moisture. | Sleepers who want warmth without feeling too stuffy. |
| Synthetic Fibre | Lightweight, practical and usually easy to wash and care for. | Everyday use, easy maintenance and many allergy-conscious households. |
Which Duvet Filling Is Best?
There isn’t one filling that’s best for everyone. If you like a lighter, more traditional feel, feather and down may appeal. If breathability is a priority, wool can be a strong option. If you want something easy to care for, synthetic fillings are often the most practical choice.
Which Duvet Is Right for You?
Once you understand tog and filling, choosing a duvet becomes much easier. The best option is the one that matches the way you naturally sleep, rather than simply choosing the warmest or most expensive one.
| If You… | Look For… |
|---|---|
| Sleep hot | A lower tog and breathable filling such as wool or another temperature-regulating material. |
| Feel the cold | A higher tog and a filling that offers plenty of insulation and loft. |
| Want something easy to care for | A practical synthetic duvet that is easy to wash and maintain. |
| Want one flexible option | An All Seasons duvet that can be adjusted throughout the year. |
| Share a bed | A duvet size large enough to give both sleepers good coverage, especially if one of you moves around a lot at night. |
Our Advice
If you’re unsure, start with your bedroom temperature and whether you tend to sleep hot or cold. Those two things usually narrow the choice down much faster than looking at tog or filling in isolation.
You can explore our full range of duvets to compare different tog ratings, fillings and seasonal options.
Duvet FAQs
Is a higher tog duvet always warmer?
A higher tog means more insulation, but the way a duvet feels also depends on the filling, construction and your bedroom temperature. A high tog duvet may feel too warm in a well-heated room.
What tog duvet should I use all year round?
There isn’t one tog that works for everyone throughout the year. If you want more flexibility, an All Seasons duvet can be useful because the separate layers can be adjusted as temperatures change.
How often should you replace a duvet?
There isn’t a fixed replacement date for every duvet. If it has lost its loft, feels uneven, no longer keeps you comfortable or cannot be cleaned properly, it may be time to replace it.
Should your duvet be bigger than your bed?
Some sleepers prefer sizing up for extra coverage, particularly couples, but this is largely down to personal preference. Make sure the duvet fits comfortably inside the duvet cover you plan to use.
Written by Alice Littler
Alice brings a background in marketing, design, and branding to Land of Beds, where she focuses on making sleep advice simple, relatable, and practical for everyday life. She holds a degree in Graphic Design with a specialism in branding and design, giving her a strong understanding of how interior spaces, colour, layout, and environment can influence comfort, mood, and overall wellbeing.
Her creative background allows her to provide both expert bed and mattress guidance and bedroom design inspiration that helps customers create spaces that feel as good as they look.
Alongside her work in marketing and branding, Alice has collaborated with internationally recognised brands including Campari and Aperol, Paulaner, and Malfy, helping develop her expertise in consumer-focused communication and lifestyle content. She has also been trained by and works closely with leading UK bed and mattress manufacturers including Harrison Spinks, Hypnos, and Vispring, building extensive knowledge of mattress technology, sleep ergonomics, bedroom comfort, and sleep wellness.
Passionate about the life-changing impact of quality sleep, Alice creates content designed to help readers make informed decisions to improve their sleep environment, wellbeing, and everyday routine.