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Here is how to choose the winter or summer duvet that truly suits the way you sleep. The season is the starting point, but it does not decide everything: a bedroom with central heating needs something different from a room in an older, poorly insulated home, and someone who always sleeps with one foot outside the duvet needs something different from someone who wraps up to the chin.
Here you will learn what duvet weight means and why it makes such a difference, how our duvet fillings in 250 g, 450 g and 4 seasons differ, and how to match your climate with the temperature in your home. By the end, you will know which one is right for you.
what you will learn
- 1What duvet weight means and why more grams do not always mean better sleep.
- 2When to use 250 g, when to use 450 g and who the 4 seasons option is for.
- 3How to match your climate with your actual bedroom temperature and get it right first time.
- 4How to switch with the seasons and store your duvet filling so it lasts for years.
what duvet weight means and why it changes everything
The duvet weight is measured in grams per square metre and tells you how much fibre is inside the filling. More grams mean more warmth. So far, so simple.
The common mistake is thinking it is safer to choose the highest number just in case. But a filling that is too warm for your bedroom does not mean better sleep: it means waking up at three in the morning with the duvet pushed down to the foot of the bed. That interrupts your sleep just as much as feeling cold, only for the opposite reason.
The ideal duvet weight is not the highest one; it is the one that suits your bedroom.
So the useful question is not “how warm is it?”, but “how much warmth do I need?”. The answer depends on three things: the season, your bedroom temperature at night and how warm or cold you tend to sleep. Let us look at all three.
Why hollow fibre keeps you warm without feeling heavy
Before the numbers, there is one thing that helps explain them. Our duvet fillings have a microfibre outer and siliconised hollow fibre inside: each filament traps air, and it is that air that provides insulation, not the weight of the filling. That is why a 450 g filling can feel very warm without feeling heavy on your body.
The siliconised finish helps the fibres glide over one another instead of tangling, which makes a difference night after night: the filling stays soft and lofty rather than clumping in the corners, and it is fully breathable, allowing body moisture to escape instead of building up. Because it uses synthetic fibre, it is also hypoallergenic, a welcome benefit for allergy-sensitive households.
Soft and lightweight
It keeps you warm with the air trapped inside, not with weight. Comfort without a heavy feel.
Breathable
It allows body moisture to escape, helping the bed stay dry throughout the night.
Hypoallergenic
Synthetic fibre makes it an allergy-friendly choice. A reassuring option for sensitive skin.
250 g, 450 g or 4 seasons
We have three options, each suited to a different moment. Here they are from lightest to warmest.
Spring and autumn
Winter nights
120 + 250 g
250 g: the most versatile option
This is the mid-season filling, ideal for spring and autumn and easy to use without overthinking it. But here is the part that surprises most people: if your bedroom is heated or well insulated, this can also be your filling in the middle of winter. Many people choose 450 g out of habit and end up sleeping with the window open in January.
450 g: for genuinely cold nights
This is the one for nights when getting into bed feels especially good. It is designed for unheated bedrooms, older homes with limited insulation or inland areas where winter temperatures really drop. If you sleep with the window slightly open all year round, this may also be the right choice for you.
The 4 seasons option: two fillings in one
This needs a little explanation because it is not a single weight but a system. The 4 seasons option consists of two separate duvet fillings, one 120 g and one 250 g, which you can use separately or fasten together. Those three combinations cover the whole year:
| How to use it | Weight | When |
|---|---|---|
| Light filling only | 120 g | Summer and mild nights |
| Thicker filling only | 250 g | Spring and autumn |
| Both fastened together | 370 g | Winter |
If you do not want two duvets taking up wardrobe space and swapping them every season, this is our most practical solution.
match your climate to your bedroom
Here is the practical part. The season gives you a clue, but the decision comes down to two things: where you live and your bedroom temperature at night. This table makes it easy.
| Your area | With heating | Without heating |
|---|---|---|
| Mediterranean coast | 250 g | 250 g |
| Mild inland climate | 250 g | 370 g (DUO) |
| Cold inland area or north | 370 g (DUO) | 450 g |
| Mountain area | 450 g | 450 g |
One thing stands out: 250 g appears far more often than most people expect. With heating, many homes in Spain can sleep comfortably with that weight in winter. The 450 g option is for genuinely cold conditions, not simply for "winter" in the abstract.
And then there is you
The figures above give you the framework, but your body makes the final adjustment. These are the three most common situations:
You sleep warm
If you stick a foot out, throw the duvet off or wake up feeling too warm, go one step lighter than the table suggests. It is more comfortable to add a plaid on the occasional colder night than to be too warm every night.
You tend to feel cold
If you go to bed wearing socks, go one step warmer. The soft loft of the hollow fibre gives you that snug, tucked-in feeling without making the bed feel heavy.
You share the bed but prefer different temperatures
A classic situation. The most flexible solution is the 4 seasons option: the colder sleeper can use both pieces fastened together for part of the year, while the warmth remains evenly distributed across the bed.
why the 4 seasons option is often the answer
If you have made it this far and are still unsure, there is a reason why we recommend the 4 seasons option so often: you do not have to decide today exactly how cold your winter will be.
With a fixed-weight filling, you are committing to one level of warmth. Choose too little and you are cold in January; choose too much and you sleep with the duvet thrown off. With the two-piece system, you can adjust as you go: fasten them together during a cold spell, use the 250 g filling during a mild February, and in summer use the light 120 g piece when you want just a little coverage.
Put simply, it gives you three weights in roughly the wardrobe space of one —well, one and a half— and avoids buying a second duvet. For anyone living in a mild inland climate, where winter temperatures can vary widely, it is the option with the least room for error.
Remember: your duvet filling needs a duvet cover
The duvet filling is the part that provides warmth, but you do not see it: it goes inside a duvet cover, which provides the colour and pattern. The advantage of this system is that you choose the warmth and the design separately, so you can change the pattern whenever you like without changing the filling. And if you prefer a single patterned piece that goes directly on the bed, what you are looking for is a quilt: ours are 300 g, a weight designed for the colder months.
how to switch with the seasons
You have chosen your weight. Now here are three practical tips to help your duvet filling last for years and make seasonal storage easier.
When to switch. There is no fixed date on the calendar; there is a simple sign. If you have spent several nights throwing the duvet off, move to a lighter weight. If you wake up looking for an extra blanket, move to a warmer one. That is a better guide than the month.
Air it before storing it. Before putting the filling away, leave it spread out on the bed or air it in the shade for a day. This simple step helps prevent that musty stored-away smell next season.
Store it without compressing it. Avoid vacuum bags: hollow fibre needs the air inside it to maintain its loft, and months of compression can reduce its insulating performance. A breathable cotton storage bag, or simply folding it on a shelf where it can breathe, is best.
And yes, you can wash it at home
That is one of the advantages of fibre compared with down. You need a washing machine with enough capacity for the filling to move freely, a gentle programme and a moderate temperature. Avoid fabric softener, as it can clump the fibre and reduce its loft. While drying, shake it from time to time so the filling recovers its volume and stays soft and lofty.
three weights, eight sizes and no surprises
We design and manufacture in Spain, which allows us to focus on the details you notice over time: fillings that stay soft and lofty after repeated washes, microfibre that stays quiet when you turn in bed, and volume that lasts season after season. Our duvet fillings are hypoallergenic, breathable and machine washable at home. No dry cleaning and no down.
designed and madein Spain
siliconised hollow fibresoft and lightweight
hypoallergenicand breathable
now you know which weight is right for you
To sum up: look at the actual temperature of your bedroom before the month on the calendar. With heating, 250 g will work for most of the year. Without heating and in genuinely cold conditions, choose 450 g. And if your winter is variable, the 4 seasons option gives you three levels of warmth in a single purchase.
discover our duvet fillings →
