This collection is empty
Continue shoppingThat makes making the bed quicker and helps keep your bed fresh, especially in summer or in a warm bedroom. Check out our range above and find the warmth class 4 duvet that fits your sleep preferences best, with 30 nights of trial sleep for extra peace of mind. Unsure about the size? Check the Duvet size chart.
What does warmth class 4 mean?
Warmth class 4 is the coolest standard within the usual warmth classes 1 through 4. Thanks to the low thermal insulation, this type of duvet retains less heat than a winter duvet and usually feels thinner and lighter. That’s why it’s a logical choice for summer, for well-insulated homes, and for people who get warm quickly in bed. If you want maximum coolness, check out our Cooling summer duvets (IceSilk).
Don’t look only at the warmth class when choosing. The material, weight, and breathability also determine how a duvet feels. For example, choose a Cotton summer duvet if you want a breathable, lightweight duvet for summer.
Choose warmth class 3 or 4?
If you’re hesitating between a warmth class 3 or 4 duvet, focus on your bedroom and your own sleep habits. Warmth class 3 is a bit warmer and often works well in spring and autumn or if you like just a touch more coziness. Warmth class 4 is better for hot summer nights, for bedrooms that heat up quickly, and for sleepers who give off a lot of warmth. If you’re looking for an alternative that offers a little more warmth, a warmth class 3 duvet may be a better fit.
If you mainly want airy, fresh sleep, summer duvets with warmth class 4 are usually the best match. If you want a duvet that also feels good beyond the hottest months, class 3 may suit you better.
When is a 4-season duvet smarter?
A 4-season duvet is handy if you want one solution for the entire year. This type of duvet consists of two parts that you use separately or together, depending on the temperature. For warm nights you use the lighter part, while in colder months you couple both parts for extra insulation.
If you want a true summer duvet that’s cool, light, and easy to care for, a separate warmth class 4 duvet is often the most targeted choice. Especially if you like making your bed quickly without fussing with a separate cover.
Frequently asked questions about warmth class 4
What is a warmth class 4 duvet?
It’s a light and cool duvet with low thermal insulation. It’s intended for summer, for warm bedrooms, and for people who like sleeping under a duvet even on hot nights.
Which is warmer: warmth class 3 or 4?
Warmth class 3 is warmer than warmth class 4. Class 4 is the coolest option and therefore better suited as a summer duvet.
Which duvets are cool in summer and warm in winter?
If you want that combination, an all-season duvet is usually more practical than a single fixed warmth class. If you mainly want comfort during the hottest time of the year, choose a duvet with warmth class 4.
Is a warmth class 4 duvet easy to keep clean?
That varies by product. Within HappyBed’s range you’ll find coverless duvets that are machine-washable, so you can freshen them up easily. Always check each product’s specific washing instructions and maximum washing temperature.
Collections
View by category

PAY LATER WITH KLARNA
Duvets without covers

Pillowcases

Pillows

Pillowcases
Frequently asked questions
Got any questions or comments? Our customer service is available from Monday to Friday!
Do you guys deliver on weekends too?
We also deliver on weekends, but keep in mind this only applies to orders placed on Thursday or Friday.
Can I still change my address?
Unfortunately, you can't change your address after placing your order, so in this case, always contact us.
What are you guys doing about sustainability?
We get how important sustainability is in today’s economy, so we always do our part. We’re super picky about which suppliers, partners, and materials we choose. Want to know exactly what we do and what steps we take to be sustainable? Check out our sustainability page for all the details. Together, we’re working towards a greener future.
How does the 30 day trial sleep work?
With us, it’s actually super simple. After your HappyBed products are delivered, you’ve got 30 days to try them out however you want. If they’re not quite your thing, you can easily return them.

