Down or polyester in a children's winter jacket? Which is better?

https://lillavilla.dk/blogs/tips-og-rad/dun-eller-polyester-vinterjakke-born

When choosing a winter jacket for your child, the filling is an important part of the decision. Should you choose a down jacket with duck down or a winter jacket with synthetic polyester filling? And what works best when winter brings frost, wind, rain, and sleet?

In short: Down provides a lot of warmth for its weight and is a good choice for cold, dry days. Polyester filling generally handles moisture better and dries faster. For the changeable Danish and Nordic winter weather, the best choice therefore depends on the weather, your child’s activity level, and the jacket’s outer material.

Here, we go through the differences to help you find a winter jacket that suits your child’s everyday needs.

What is the difference between down and polyester filling?

Both down and polyester filling insulate by trapping air, which helps retain body heat. The main differences are weight, bulk, and how the materials respond to moisture.

Down is a natural filling from ducks or geese. The fine down creates small air pockets, providing good insulation without necessarily making the jacket heavy.

Polyester filling consists of synthetic fibers designed to provide a similar insulating effect. It is often practical in wet weather because the fibers generally retain more of their insulating ability when wet.

Down vs. polyester - comparison

Property	Down filling	Polyester filling
Warmth relative to weight	Very high	Good, but often requires more filling
Weight and packability	Lightweight and highly compressible	Typically a little heavier and bulkier for the same level of insulation
Damp conditions	Loses insulating ability if the filling gets soaked	Retains its insulating ability better in damp conditions
Drying time	Typically requires a longer drying time	Often dries faster
Care	Requires special attention when drying	Often easier to care for
Best suited for	Cold, relatively dry days	Wet and changeable weather

Neither material is automatically best in every situation. A good winter jacket should be judged by its overall construction, not just its type of filling.

What does 90% duck down and 10% feathers mean?

When a winter jacket is labeled 90% duck down and 10% feathers, this describes the composition of the down and feather filling.

Down is soft and lofty and contributes especially to insulation. Feathers have a firmer structure.

A high proportion of down can be an advantage when you want good warmth with low weight. But 90% down does not automatically mean that the jacket is warmer than every other winter jacket.

Overall warmth also depends on:

• The amount of filling in the jacket.
• The fill power of the down, if stated.
• The jacket’s construction and insulating chambers.
• The outer fabric’s protection against wind and moisture.
• The fit and the clothing worn under the jacket.

It’s also important to know that 90% down does not mean that 90% of the entire jacket is made of down. The percentage describes the filling composition.

At Lilla Villa, you'll find several down jackets for children with duck down. The exact material composition is listed in each product description.

Can a winter jacket contain both down and polyester?

Yes. Many winter jackets are made from different materials in different parts of the jacket.

For example, a jacket may have down filling in the body and sleeves, while the hood or collar contains polyester filling.

This doesn't mean the jacket is lower quality. Different materials can be used in different parts of its construction.

It's also important to distinguish between three different parts of a winter jacket:

Outer fabric: The fabric on the outside of the jacket, which affects, among other things, protection from wind and rain.

Lining: The fabric on the inside, which sits against your child's other clothes.

Filling: The insulating material between the outer fabric and the lining.

So if a product description says 100% polyester, you should check whether that refers to the outer fabric, the lining, or the filling itself.

Which winter jacket is best for Danish and Nordic winter weather?

Winter weather varies considerably across the Nordic region. A windy, rainy winter's day on the Danish coast calls for different outerwear than a dry, frosty day in northern Sweden or Norway.

For Danish winters with rain, wind, and sleet

Denmark has a coastal climate with relatively mild, damp winters and changeable weather.

If your child spends a lot of time outdoors in wet weather, protection from moisture is important. A winter jacket with synthetic filling can be practical because the filling withstands moisture better.

A down jacket can also work well for Danish winters if it's suited to the temperature and the down filling stays dry. In heavy or persistent rain, it's important to choose outerwear with sufficient water protection.

For cold, dry winter days

When temperatures drop and the weather is relatively dry, down is a good choice.

Down provides effective insulation for its weight. This can be an advantage for children who need to move freely without wearing an unnecessarily heavy jacket.

This applies both on cold Danish winter days and in parts of Sweden and Norway, where winter weather is often colder.

For active play at daycare and school

Children run, climb, ride bikes, and play outdoors - even in winter.

Freedom of movement is at least as important as insulation. A very thick jacket isn't necessarily the most comfortable choice for a child who's constantly on the move.

Choose a jacket that lets your child lift their arms, bend down, and play comfortably. Also make sure they can easily take off a layer if they get too warm.

For leisurely walks and cold mornings

If the child goes on longer walks, waits for transport or spends a lot of time standing still outdoors, they may need more insulation.

A warm down jacket can be a good choice here. A longer style can also provide extra coverage around the hips and thighs.

Also read our guide: Short or long down jacket for children – which should you choose?

Is a down jacket waterproof?

Not necessarily. Down filling and waterproofing are two different things.

A jacket can be well insulated with down without being waterproof. Conversely, a jacket with polyester filling may also have an outer fabric that doesn't provide enough protection from rain.

The main difference is:

Water-repellent: The outer fabric can repel some water, but that doesn't mean the jacket can withstand prolonged rain.

Waterproof: The jacket is designed to resist water penetration in the conditions it is intended for. The seams and overall construction also matter.

So if your child often plays outside in rain and sleet, check the jacket's documented water protection rather than looking only at the filling.

How to choose a winter jacket for your child

Before buying a new winter jacket, you can start by asking four simple questions.

1. What's the winter weather like where the child lives?

Is it mainly cold and dry, or is there often rain, wind and sleet? This affects both the filling and the outer material.

2. How active is the child outdoors?

A child who runs and plays a lot may have different needs from a child who often stands still in the cold.

3. Is there room for multiple layers of clothing?

A winter jacket should fit without being tight, but it shouldn't be so large that it lets in too much cold air. There should be room for a suitable mid-layer.

4. How easy is the jacket to use every day?

Check the zipper, hood, freedom of movement, care instructions and how the jacket works with the child's other winter clothes.

If you're unsure when it's time for a thicker winter jacket, read our guide to temperatures and winter jackets for children.

Frequently asked questions about down and polyester in winter jackets

Is down warmer than polyester?

Down generally provides more warmth relative to its weight than ordinary synthetic insulation. But how warm a particular jacket is also depends on the amount of filling, construction, outer fabric and fit. A thick polyester-insulated jacket can therefore be warmer than a thin down jacket.

Is polyester filling better for children in Denmark?

Polyester filling can be a practical choice in Denmark's damp winter weather, especially if the jacket is often exposed to moisture. Down, on the other hand, can be suitable for cold, dry days. The best choice depends on how your child uses the jacket.

Can children wear a down jacket in the rain?

Yes, a down jacket with suitable water protection can be used in light precipitation. But down filling loses some of its insulating ability if it gets soaked. For extended periods in heavy rain, choose outerwear designed for wet conditions.

Is a jacket with 90% down always very warm?

No. The percentage indicates the composition of the filling, not how much filling the jacket contains or how warm the jacket is overall. The amount of filling, fill power, and construction also play a role.

How do you wash a children's down jacket?

Always follow the care instructions on the specific jacket. Down requires special attention during drying because the filling must be completely dry and retain its loft.

Read our guide to washing and caring for children's down jackets.

Conclusion: Should you choose down or polyester?

There is no single filling that is best for all children and every winter day.

Down is a good choice if low weight and good insulation are most important, and the jacket will mainly be used in cold, relatively dry weather.

Consider polyester filling if your child often spends time in damp conditions, where faster drying and better insulation when damp are an advantage.

Whatever filling you choose, it's important to consider the outer material, fit, activity level, and weather.

At Lilla Villa, you can explore our selection of down jackets for children or see winter jackets for babies and younger children as well as children aged 6–14.

The goal is a winter jacket that keeps your child comfortably warm and lets them play and move freely throughout winter.

Yderligere læsning: DMI – Typisk vejr i Danmark og Rab – Down or synthetic insulation.