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The Ultimate Duvet Tog Guide

Author: James Higgins

When you get into bed, especially after a long day at work, you want to know that you’re settling down for a comfortably cosy night’s sleep, whether it’s the height of summer or a bleak winter’s evening. But the only way to guarantee luxury is by having quality bedding.

In this article, we’ve explained everything you need to know before buying a duvet, including useful insight into what ‘tog ratings’ really are and the different types to choose from.


What does tog mean?

You’ll have likely seen the term used to describe duvets, but what does tog mean and how does it affect your quality of sleep?

Choosing a duvet with the right level of heat retention is perhaps the most important decision you can make when buying bedding. After all, it’s often the embrace of your quilt that guides you into a comfortable slumber.

You’ll typically notice that duvets are labelled with a ‘tog rating’, which is a standardised measurement that defines their level of warmth; however, some retailers will also highlight whether the duvet is best-suited to ‘winter’, ‘summer’, or ‘all seasons’.

Reading on, we’ve explained how to decipher the duvet tog rating system, and how to choose the right duvet for optimum comfort.


Duvet tog rating system explained

When browsing duvets, it can be helpful to have an idea of what the different tog ratings mean. The scale ranges from 1 to 15, with 1 being very cool and 15 being the warmest – but most duvets start at 4.5:

  • 4.5 tog – a 4.5 tog rating is designed to keep you cool at night, and ideal for anyone who suffers from night sweats.
  • 7.0 tog – a 7.0 tog rating is still on the cooler end, but offers a little more warmth if your room is air conditioned or you keep a fan on in the night. It’s also ideal for when the temperature begins to start fluctuating between seasons, and often chosen for year-round bedding.
  • 10.5 tog – slightly warmer, a 10.5 tog rating continues to offer enough insulation to keep you toasty when it’s cold without becoming unbearable in the heat.
  • 13.5 tog – a 13.5 tog rated duvet is ideal for cold-weather bedding, but might become a little too much when the temperature starts to crank up. Consider buying alongside a cooler quilt that you can swap over.
  • 15 tog - 15 is the highest tog duvet rating, and, again, might feel a bit too much in the heat. You should almost definitely consider buying alongside a thinner duvet, so you have a cooler option.

Before buying new bedding, it’s also worth acknowledging that, while commonly the case, duvet thickness and heaviness doesn’t always equate to warmth. Some materials and fillings can be heavier than others, but provide a cooler sleeping experience. The only way to determine warmth is to check the tog rating.


Choosing the right duvet tog for each season

As the seasons change and the temperature begins to either rise or drop, it can be tricky to get consistently comfortable in bed with the same duvet. Unless you have an all-season duvet, it helps to have two quilts that you can swap between throughout the year: one for the cooler months and one for the warmer months.

What tog is a summer duvet?

In high summer, when the weather’s bordering unbearable and the evenings begin to feel clammy and uncomfortable, you might want to swap out your regular duvet for one that keeps you a little cooler. Otherwise, you can end up spending the whole night awake, feeling sweaty and struggling to drift off.

Consider a quilt that’s 4.5 tog or less, that combats the high temperatures by releasing body heat as you sleep. If the weather’s not quite so warm, you might be better suited to a duvet rated 7-9 tog.

Winter duvet tog ratings

In contrast to summer, when winter rolls around, you might want a quilt that more effectively traps your body heat to keep you warmer. Otherwise, you run the risk of suffering from shivering and broken sleep. However, before choosing, bear in mind that an increase in central heating might do enough to combat the cold nights.

If you have an older home or heat-inefficient property, though, consider a quilt that’s at the very warm end of the scale, 13.5+ for ultimate heat retention during the long and chilly nights. If you’re someone who prefers to keep things a little lighter, a winter duvet that’s 10.5 tog should also keep you comfortable.



Duvet tog



4.5 or less


Late spring/early autumn

7 to 9


Early spring/late autumn





Very warm



What is an all-seasons duvet?

An all-seasons duvet combines the benefits of a winter and summer quilt, and is often made in two parts. The two parts can either be separated or attached, to combat the conditions, whether hot or cold.

Typically, the cooler part of the duvet will be 4.5 tog, while the warmer part will be 9. Combined, you’ll have a 13.5 tog duvet that can keep you warm during even the chilliest nights.


How to find the right duvet tog

To find the right duvet tog, it’s important to consider two key factors:

  1. The temperature of your bedroom

Your room temperature will play a big part in which duvet you choose. For instance, if you have a poorly insulated bedroom that gets very cold at night, you might want the highest tog duvet to keep warm.

  1. Your own sleeping preferences

Every sleep style is different, so feel free to take your own preferences into account. For instance, you might want a quilt that keeps you cool at night, even during the winter months.


Shop our unique super soft eucalyptus silk all-season duvet



What is the highest tog duvet for children and babies?

Children typically need more sleep than adults, so having the right bedding for a comfortable night’s rest is even more important. Without enough sleep, children can become lethargic and tired, which makes it more difficult for them to learn, play, and engage.

When buying bedding for children, toddlers, and babies, it’s also important to bear in mind that their bodies can’t regulate warmth as efficiently as adults, and they’re more likely to overheat with a duvet tog rating that’s too high. As a rule of thumb, consider:

  • Babies: babies under 12 months old don’t require any kind of duvet, because they overheat very easily. Any kind of heavy cover can also run the risk of suffocation during the night. Instead, babies find it much more comfortable to sleep with a lightweight blanket.
  • Toddlers: just like babies, toddlers struggle to regulate warmth and are likely to overheat with a duvet tog rating that’s too high. Aim to stick to a duvet tog rating of 4.5 or less; but if they’re room gets particularly cold in winter, consider upgrading to a 9 tog.
  • Children over 3 years old: once children reach the age of three, their bodies begin to get better at regulating warmth and they’re less at risk of overheating. Children between three and nine can comfortably sleep with a duvet tog rating between 4.5-9, while older kids can handle up to 10.5.


The different types of duvet fillings

Of course, duvet warmth isn’t the only factor to consider when choosing new bedding; you’ll also need to take the filling into account, depending on personal choice and circumstances such as allergies. We’ve outlined the different types of natural and synthetic fillings and why you might want to consider each.



Down or feathers – down and feathers are similar, but also slightly different. While feathers come from any part of the bird (i.e. duck or goose), down refers to the soft and fluffy under-feathers found at the breast. You can often buy duvets with one filling or a combination of both for a luxurious night’s sleep.

Wool – wool-filled duvets can offer excellent insulation, thanks to the material’s knack for efficiently trapping air. On top of being especially warm, wool is also a relatively light material that can be smoothly dispersed for an even sleeping temperature.

Silk – instead of being stuffy and bulky, silk duvets are noticeably thinner and more lightweight than other popular alternatives. Additionally, due to silk’s hypoallergenic properties, they’re the ideal option for anyone who struggles with dust and mites. Interestingly, unlike most other duvets, silk isn’t measured in togs but by weight instead; the higher the weight, the warmer the duvet.

Bambooour popular duvets are filled with a bamboo blend that’s perfect for all seasons. Breathable and comfortable, each duvet is also resistant to dust, mites, and mould, ideal if you’re looking for hypoallergenic bedding.



Synthetic duvets are typically made using lightweight hollowfibre or microfibre polyester, offering soft and silky comfort all night long. Benefits of synthetic duvets include:

  • They’re hypoallergenic, which makes them suitable for anyone who suffers from sensitivity to mites and dust.
  • They’re generally more affordably priced.
  • They can be machine washed frequently and are straightforward to look after.


How to choose the right duvet size

The size of your bed will dictate the size of duvet you need, ranging from single and double through to king, super king, and emperor. Duvet dimensions in the UK are:





140 x 200cm


200 x 200cm


225 x 220cm

Super King

260 x 220cm


290 x 235cm


As a rule of thumb, you should buy bedding and duvets that match your mattress, but feel free to size up if you want to feel especially cosy or you tend to find yourself fighting with your partner for coverage.

It’s also useful to pick a duvet that’s around 20-30cm longer than your height, to ensure your feet or chest don’t chill during the night. If you’re taller than your bed, you might want to consider an upgrade on frame and mattress, but in the meantime it can be helpful to choose the right size duvet at the very least!


ethical bedding's eucalyptus silk duvet cover in pearl wheat

Shop our natural eucalyptus silk duvet covers (various colours)


Why choose an Ethical Bedding duvet?


When choosing the right duvet, never settle for second best, in terms of both comfort and quality. With a tog rating of 7.0, our unique quilt is the ideal all-season solution, offering sufficient warmth in the winter and breathability during the hot summer months – but if you do want to up the cosiness, you can always add another layer!

Each Ethical Bedding duvet is made using 100% organic eucalyptus silk and filled with a blend of recycled plastic and bamboo. This makes the quilt both responsibly sourced and sustainably harvested, as well as completely resistant to dust, mites, and mould.

But that’s not all; because eucalyptus silk is softer than cotton, you’re guaranteed lavish luxury every single night.

Hopefully, our duvet tog guide has offered useful insight into the steps to follow when exploring our complete range of bedding. In the meantime, check out our blog for even more advice from our passionate team of experts.