How Warm Is a 10.5 Tog Duvet?
Answering questions on how warm specific duvets are is a bit like answering how long is a piece of string… Essentially, the higher the tog rating, the more insulating the duvet, however, that’s not to say that a warm sleeper will find a 10.5 tog duvet too hot in Summer, while a cold sleeper might find it not warm enough.
When choosing the right duvet for you, it’s important to consider how warm your bedroom is at night from season to season, as well as whether you run hot or cold overnight. If you’re not warm enough at night, check which tog rating your duvet has, and continue with our guide so you can learn which duvet is best for you so you can have a great night’s sleep.
While likely originating from the Latin toga, meaning to cover, the term tog was first used to refer to the insulating qualities of material in the 1940s; though it has now been given the acronym Thermal Overall Grade for simplicity. Tog ratings go from 1 to 15, with 1 as the least insulating, so cooler material, and 15 being the most insulating, so hotter material.
Most duvets, however, have the following tog ratings:
- 4.5 tog
- 7 tog
- 10.5 tog
- 13.5 tog
- 15 tog
You may also find that duvets with the same tog rating are thicker or thinner than the other, as the type of material filling the duvet also has an impact on the insulating qualities of the duvet and thus its tog rating.
How Filling Affects Tog Rating
Since tog ratings are based on the insulating qualities of the duvet, the material used to fill the duvet has a big effect on the duvet’s insulation.
Goose or duck feathers and down are often used to fill duvets and pillows due to their being ultrasoft and naturally insulating to keep the birds themselves warm. Feathers and down from Canada and Scandinavia are often more insulating (and more expensive) due to the birds being regularly surrounded by snow and ice and thus requiring more insulation from their feathers.
Hollowfibre and microfibre duvets are synthetic, so are less insulating than feathers and down, as well as being more lightweight materials. In this way, you can have a 10.5 tog feather-filled duvet that’s thinner than a 10.5 tog hollowfibre duvet; the tog rating is the same, but the insulating qualities of the material are different, so more hollowfibre is required to achieve the same level of insulation as the feather duvet.
Best Summer Duvets
There can be a 10-degree difference between the temperature of Summer nights and Winter nights in the UK, so it’s best to get yourself a Summer duvet and a Winter duvet to make sure you’re sleeping well throughout the year.
But before you buy a duvet, you should first consider:
- Outside temperature
- Inside temperature
- Sleeping body temperature
- Duvet cover material
Summer duvets should be on the lower end of tog ratings, usually between 4.5 and 7 tog, depending on your local climate as well as your bedroom temperature and sleeping preference. Hot sleepers will want a lower tog, while cold sleepers will want a higher tog, so you can make sure you don’t wake up sweating or shivering.
You should also note that if you’re waking up in Summer shivering and damp, the tog of your duvet may be too high rather than too low, causing you to sweat a lot, which cools down your skin and causes you to shiver. So don’t instantly buy a warmer duvet if you wake up shivering in the night, check that you’re not actually getting too hot first.
Generally, however, a duvet with a tog rating over 10.5 will be too warm for Summer, especially for people with high sleeping body temperatures.
Best Winter Duvets
In Winter, you’ll want a duvet on the higher end of the tog spectrum, with most people in the UK opting for 10.5 to 13.5 tog duvets, although in particularly cold areas or for people in older houses without good insulation, 15 tog duvets are most suitable.
Part of what’s enjoyable and snuggling up in a cosy bed in Winter is having a thick or spongey duvet to cuddle up with, so if this is the case for you, you should also think about the filling of your duvet so you can have the right thickness and feel of your duvet as well as staying the right temperature overnight. For example, hollow fibre-filled duvets need to be dense and thick to achieve a higher tog rating, so these duvets are often perfect for sound sleep in Winter. But if you prefer a heavy duvet to comfort you, you could invest in a down duvet, as this is heavier than synthetic alternatives.
Are There All-Season Duvets?
High-quality duvets can be expensive, and sometimes hard to wash, but fortunately, you don’t need to buy a duvet for every season thanks to year-round duvets!
Most all-season duvets are around 9 tog as this is the most average duvet tog, so people can stay comfortable even with the changing seasons. Although, cold sleepers can use a 10.5 tog duvet all year round and add an extra blanket on the frosty nights in Winter, while hot sleepers can use a 7 tog duvet throughout the year and sleep comfortably.
If your area has drastic temperature differences between Summer and Winter, or you’re finding you’re too hot in Summer and too cold in Winter, you can buy two duvets instead: one 4.5 tog and one 9 tog. That way, you can use the light 4.5 tog duvet on the unbearably hot nights in Summer, the 9 tog through Spring and Autumn, and combine the two for a 13.5 tog duvet in Winter.
What’s more, if you and your partner have different sleeping body temperatures, you can have one duvet each for most of the year, and then combine the two, plus your body heat to stay warm in Winter!
What Duvets are OK for Children?
Children’s body temperatures when they sleep are much higher than those of adults, so you should be careful when introducing duvets into your children’s beds as you don’t want them to overheat during the night. Babies under 1 year should never use duvets but should have blankets designed specifically for use in cots, as they can’t regulate their body temperature at that age, nor communicate well that they’re uncomfortable, so blankets allow them to stay comfortable. Giving a baby a duvet can result in serious health complications due to overheating and even fatalities so should be avoided at all costs.
As your child grows, you can begin to introduce thin duvets between 1 and 4.5 tog, and up to around 9 tog as they reach 10 years old. Children under 10 years old should not have duvets with a tog rating over 10.5, as these duvets are highly insulating and can be uncomfortably hot and even dangerous for children.
Over 10 years old, you can slowly raise the tog of your child’s duvet according to their comfort, the weather and the temperature of their bedroom.
Buy the Best Duvet – Bedding Comfort Store
At the Bedding Comfort Store, we know that the perfect duvet can be hard to come by, and they’re often very expensive. That’s why we made it our mission to provide Britain with high-quality, affordable bedding, from duvets and pillows to bed linen and mattress protectors, and everything you need to keep the little ones comfortable.