Soft, fluffy, and light — goose down is seen by many as the traditional choice for warmth and luxury bedding.
But in reality, the best duvet for you is the one that performs how you need it to.
We'll break down how each filling actually performs once you’re asleep, based on independent research.
What is a goose down duvet?
Goose down and Feather & down duvets are made from the soft under layers of ducks and geese. Down creates loft and insulation by trapping air, while feathers add structure.
They are known for:
- Soft, fluffy, cloud-like comfort
- Strong insulation and warmth
- A lightweight feel
Feather & down works by trapping heat and air close to the body. This is what keeps you warm.
For some people this works beautifully. For others, it can feel too warm or inconsistent and lead to waking up throughout the night.
How wool works differently
Wool is designed to regulate temperature in changing outdoor conditions.
In bedding, wool doesn’t just insulate — it responds to your body's needs.
A wool duvet:
- Allows air to move through the wool fibres
- Absorbs and releases moisture as your body changes temperature
- Helps reduce temperature spikes through the night
- Supports a more stable sleep environment
In simple terms, wool helps your body stay at a comfortable temperature.
Wool vs feather & down:
A controlled study by the BioComposites Centre at Bangor University, compared duvets made from wool, feather & down, goose down, and synthetic under identical conditions.
All duvets were tested at similar warmth levels (10–10.5 tog equivalent conditions) to ensure a fair comparison.
Here’s what the study showed:
1. Wool provided stronger insulation
The wool duvet delivered stronger insulation performance than feather & down and synthetic fills, despite appearing lighter and less voluminous.
2. Wool gave a more stable temperature
When tested over 8-hours, the wool duvet maintained a more consistent internal temperature compared to the other fillings.
Instead of heat building and dropping, the wool duvet created an even temperature overnight.
3. Wool controlled moisture and humidity better
Your body releases moisture while you sleep — what happens to that moisture affects your sleep quality.
The study found:
- Wool moved moisture through the duvet more efficiently than the others
- Wool helped prevent moisture build-up under the duvet
In simple terms, the wool duvet didn’t trap moisture, it moved it away.
Full study: HERE
Why moisture control matters for sleep quality
When moisture and heat are trapped under your duvet, your body becomes more humid.
That’s when you'll notice things like
- Waking feeling too hot
- Restlessness through the night
- Kicking covers off and on
- Broken sleep cycles
How wool and feather & down actually feel
A feather & down duvet feels:
- Soft and very light
- Warm and insulating
- Enclosing and cosy
A wool duvet feels:
- Heavier and flatter over the body
- More consistent temperature through the night
- Breathable and dry
- Less prone to overheating
- Stable across seasons
A modern evolution: FlokWeb
Traditionally, wool duvets haven’t had the same light, lofty feel associated with feather & down. Wool has been more about performance than soft, cloud-like comfort.
FlokWeb* was developed to bring those two experiences a little closer together.
Engineered to create a more cushioned feel when you sleep under it — FlokWeb is closer to the softness people associate with feather & down.
It’s still 100% NZ wool, just shaped a little differently.
*Fibretech New Zealand Limited, developed the technologies behind FlokWeb. Learn more about the farmers growing the wool HERE
FlokWeb: Image supplied
What duvet is best for you?
Answer these quick questions to figure out which is the right choice for you:
1. How do you usually feel at night?
A. I often feel too warm
B. I like being cosy and warm
C. I go between warm and cold
2. What do you prefer in a duvet?
A. Light and breathable
B. Soft and fluffy
C. Balanced and steady
3. Do you share your bed?
A. Yes, and one of us sleeps hot
B. Yes, but we’re both cold sleepers
C. Yes, and we struggle to find balance
4. What happens overnight?
A. I kick covers off or wake hot
B. I stay warm and comfortable
C. I wake from temperature changes
Your result:
Mostly A → Wool may suit you best
You likely overheat or experience temperature swings. Wool helps regulate heat and moisture for a more stable sleep.
Mostly B → Feather & down may suit you best
You enjoy softness and warmth in stable conditions.
Mostly C → Wool may help balance your sleep
You’re likely sensitive to temperature changes overnight.
Final thought
The right duvet isn’t just about comfort when you first get into bed — it’s about what happens over the next 6–8 hours.
As bedding responds differently to heat, airflow, and moisture, small changes in what you sleep under can have a real impact on how you rest.
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