Wisewool™ Duvet Inner
30 nights to love it, or your money back.
Sleep runs on temperature. Your body lowers its own to fall asleep, and the range it needs to stay in is narrow. A sheep solved that problem long before anyone thought to make bedding out of it.
Wool absorbs up to a third of its own weight in moisture without ever feeling damp, then gives it back to the air. Taking moisture on warms it a little. Giving it back cools it a little. So the temperature under the duvet gets nudged back instead of swinging. That is what temperature regulation means. Down manages under a tenth of its weight. Polyester, under one percent, does none of it.
Ours is New Zealand strong wool from Tairāwhiti Gisborne, needle-punched into one continuous fleece rather than blown in loose. It drapes evenly across the bed and stays where it is put. Pure wool and nothing but. No antibacterial finish, no biocide, no flame retardant, because wool has never needed them.
Two weights and six sizes, in a 300TC cotton lining, made by hand in our Auckland workroom.
If you are buying one duvet, start with the 200gsm. The choice is not symmetrical. A duvet that turns out too light is fixed with a blanket over the top. A duvet that turns out too warm cannot be made lighter.
Why our 200gsm goes further than the number suggests. Grams per square metre tells you how much wool is in a duvet. It does not tell you how much of that wool is where you need it. Loose fill drifts with use, so a duvet that started even can end up heavy at one end and thin in the middle, and a thin patch is a cold patch no matter what the label says. Ours is needle-punched into one continuous sheet, so the wool cannot move. Under 80,000 compression cycles at SATRA it held about 95% of its thickness, which means it is still doing that in five years.
200gsm suits rooms above about 18 degrees and people who sleep warm. It is our most ordered weight and it carries most New Zealand bedrooms through the year.
350gsm is for uninsulated or unheated rooms, people who sleep cold, and people who simply like more weight on them. It is also the winter half of a two-duvet setup.
Sharing with someone who runs colder than you? Keep the 200gsm and let them add a layer on their side. That is easier to live with than making the warmer sleeper too hot.
Sizes
Single 140 x 210cm. King Single and Double 180 x 210cm. Queen 210 x 210cm. King 245 x 210cm. Super King 265 x 210cm. Californian King 285 x 210cm, made to order.
Custom sizes
Beds are not all standard, and neither are boats, motorhomes or antique frames. Send us your measurements and the weight you want, and we will confirm a price and make one to fit.
Handcrafted in our Auckland workroom from local and imported materials:
- 200gsm or 350gsm Wisewool™ needle-punched wool blanketing, New Zealand strong wool, roughly 30 to 40 micron
- 300TC 100% cotton lining, certified STANDARD 100 by OEKO-TEX®
- Reinforced cotton corner loops
- Calico cotton drawstring carry bag, save $10 at checkout if you do not need the bag
Nothing is applied to the fill. No antibacterial finish, no biocide, no flame retardant.
Pure wool does not like to be roughed up or heated while wet. Regular airing keeps it fresh and reduces how often it needs washing.
Machine washable in a front loader, or a top loader with no agitator, on a COLD delicate or wool cycle, using wool detergent.
Dry naturally. If needed, finish in a tumble dryer on no heat. It can be ironed warm. Gently stretch the fibres as you go to help guard against shrinkage.
You may notice traces of natural vegetable matter such as grass, straw or thistle in the wool. Some makes it through the double-scouring wash. It softens with use and is a sign of how little is done to the wool.
Free NZ shipping on orders over $150
Free AUS shipping on orders over A$150
Flat rate shipping applies to orders below these thresholds. Shipping costs are calculated at checkout based on your location.
We ship across New Zealand and to over 100 countries worldwide using trusted freight partners.
Auckland customers are welcome to collect from our workroom, Mon to Fri, 9am to 4pm, excluding public holidays.
View full shipping details here
At the Do Not Disturb Sleep Company, when we are fortunate enough to make a sale, we believe that is the start of our job. Our job is not done until our customers, hopefully you, love their sleep and wake up feeling refreshed and happy.
So we are proud to offer a 30-night Love Your Sleep promise. If the sleep essential you purchase is not delivering to your expectations, you can return it within 30 nights for a full refund, excluding shipping cost if applicable.
Click here to view our refund policy.
What owners say
37 verified reviews
Overheating is a thing of the past
This duvet has improved my sleep quality 100%. Overheating is a thing of the past and I can now sleep through the night, absolute game changer. Also love that I am keeping nasty synthetics out of my sleep environment.
Louise G. Verified
Switched from 90/10 goose down
I had my doubts on whether a 350gsm wool duvet inner could compete with my 90/10 goose down duvet inner. I became more concerned given the significant difference in loft. However, tested on the coldest of Invercargill nights the wool duvet inner outperformed the goose down.
Craig J.
Verified
Invercargill
Choosing
Which Weight Suits Your Room
The weight decision matters more than the size decision, and the choice is not symmetrical. If a 200gsm turns out too light, you add a blanket. If a 350gsm turns out too warm, there is nothing to take away. That is why we point most people to the 200gsm.
Compare the two weights
| Feature | 200gsm Warmer Rooms | 350gsm Cooler Rooms |
|---|---|---|
| Wool per square metre | 200 grams200g | 350 grams350g |
| Best for | Rooms above about 18 degreesAbove 18 degrees | Rooms below about 18 degreesBelow 18 degrees |
| If you sleep | Warm, or somewhere in betweenWarm | Cold, or you like more weight on youCold |
| Through summer | Comfortable on all but the hottest nightsComfortable | Usually too warmToo warm |
| Through winter | Fine in an insulated or heated roomInsulated rooms | Our pick for an uninsulated roomUninsulated rooms |
| Sharing a bed | The cooler sleeper adds a layer on their sideAdd a layer on one side | Suits two cold sleepersTwo cold sleepers |
| If you choose wrong | Add a blanket over the topAdd a blanket | There is nothing to take awayNothing to remove |
Start with the 200gsm
If you are buying one duvet and you are not certain, this is the one. It carries most bedrooms through the year, and on the coldest nights a blanket over the top closes the gap. It is our most ordered weight.
Choose the 350gsm if
Your room is uninsulated or unheated, you sleep cold, or you like more weight on you.
It is also the winter half of a two-duvet setup. Every duvet has reinforced cotton corner loops, so a 200gsm and a 350gsm can be tied together for the coldest weeks. Two duvets in one order saves 15%.
How This Duvet Gets Made
Grown in Tairāwhiti Gisborne
The wool comes from more than 250 partner farming families on New Zealand's East Coast, all working to New Zealand Farm Assurance Programme standards. The region's warm maritime climate grows strong wool with almost no plant matter in it, which is why the next step needs no chemistry. Wisewool's family have been grading wool here since 1894.
Cleaned and Needle-Punched
Most wool used in bedding is chemically carbonised to burn out plant matter, scoured with harsh detergents, or bonded with synthetic resins to hold its shape. Ours goes through none of that. It is washed gently, without chemicals, then needle-punched into blanketing at the Wisewool factory at Te Poi.
The inside
A Fabric, Not A Filling
Most wool duvets are filled with loose wool, blown in and quilted into pockets to hold it roughly in place. Ours is not.
Wisewool™ blanketing is made by punching millions of barbed needles through stacked sheets of wool until the fibres lock into each other. What comes out is a single sheet of wool that holds its own shape.
That is why the duvet lies flat. There is nothing loose inside it to migrate to one end, clump in a corner, or leave a thin patch where the warmth should be. It is also why grams per square metre tells you so little about how warm a duvet will be.
The wool sits inside a 300TC cotton lining, and every duvet has reinforced cotton loops at the corners so it stays tied where it should be.
Independently tested
Tested Against What is in Most Other Duvets
Wisewool sends its wool to independent laboratories rather than making claims about it. Three results matter for a duvet, and each one was run to a named international standard.
NZWTA, New Zealand
Nothing found that should not be there
Wool is farmed, and farmed fibre can carry pesticide residue. So it gets tested for it, across every category the standard covers.
Nothing was detectable. The same result came back for certified organic wool tested at the same time.
Why it matters. When we say nothing is added to the wool, this is the part that is checkable. No antibacterial finish, no biocide, no flame retardant, and nothing left over from the farm either.
Test method IWTO-DTM-59.
SATRA, United Kingdom
Squashed 80,000 times, and it came back
A machine drops a weighted foot onto the material 80,000 times, then leaves it six hours to recover. Furniture makers use it to find out whether a cushion will sag in three years, without waiting three years.
The needle-punched wool came back with about 95% of its thickness. The polyester lost far more, and did not recover it.
Why it matters. Warmth comes from air trapped between the fibres, not from the fibres themselves. A filling that flattens for good is a duvet that gets colder every year while looking much the same. That is what people mean when a duvet has gone flat.
EN ISO 3385:2014, UKAS Lab 0248, Report FUR0344456 2307.
NZWTA, New Zealand
It would not catch, so nothing had to be added
A flame and a smouldering cigarette are held against a mock-up of filling and cover, then taken away, and the testers watch what happens next.
The wool showed no smouldering and no flaming at any stage. Polyester fill and foam chips tested alongside it failed, with what the laboratory called unsafe, escalating combustion.
Why it matters. Synthetic fillings often need flame-retardant chemicals to behave this way. Wool does not. So nothing added to the wool is not a step we skipped. It is a step the material never needed.
BS 5852, Certificate 1446262.6A-D.
Goes with
The Same Wool, Under Your Head
The duvet uses Wisewool™ as a single sheet. The Wisewool™ Pillow uses the same wool engineered the other way, into a springy loose fill.
It arrives with more fill than most people need. Take some out until the height is right, keep what you removed, and put it back as the pillow settles. Most pillows give you one height and you either get on with it or you do not.
Same farms, same testing, same nothing added to it. If untreated wool is worth having over you, it is worth having under your head, where your face is against it all night.
Any two items in one order saves 15%.
FAQ
If you are buying one duvet and you are not certain, start with the 200gsm. The choice is not symmetrical. A duvet that is a little too light is fixed with a blanket over the top. A duvet that is too warm cannot be made lighter, and a warm sleeper under a 350gsm in February is stuck with it.
Go to the 350gsm if your room is uninsulated or unheated, if you sleep cold, or if you like more weight on you. Some people buy one of each and rotate them through the year.
Sharing with someone who runs colder? Keep the 200gsm and let them add a layer on their side.
Grams per square metre is the only number most wool duvets publish, so it becomes the number people compare. It tells you how much wool is in the duvet. It does not tell you how much air that wool holds, how evenly it holds it across the whole duvet, or whether it will still be holding it in five years.
Ours is needle-punched into a single bonded sheet rather than blown in as loose fill, which is why it lies flat and keeps its loft. A heavier duvet is not automatically a warmer one, and it is certainly not a longer-lasting one.
Our duvets are cut to standard New Zealand sizes, so a cover bought here will fit. If your cover was bought overseas, check its dimensions against ours in the Choosing Your Weight and Size panel above, because Australian and European sizing differs.
If nothing standard fits your bed, send us the measurements and we will make one.
The wool is fully enclosed inside the cotton lining, so it never touches your skin. What touches you is 300TC cotton certified STANDARD 100 by OEKO-TEX®, which is tested for harmful substances.
Nothing is applied to the fill. No antibacterial finish, no biocide, no flame retardant. If you react to something, we would rather it was not something we added.
You are not in contact with the wool. It sits inside the cotton lining, and the lining is what you feel. Wool blankets itch because the fibre is against your skin. This is not that.
Yes, and you should not need to often. Wash cold on a delicate or wool cycle in a front loader, or a top loader with no agitator, using wool detergent. Dry naturally.
Heat and agitation are what wool dislikes. Keep both gentle and it will stay in good condition. Full care instructions are in the panel above.
We have been making these duvets unchanged since 2023, so the honest answer is that the oldest ones in use are a few years old and still going.
What we can point to is the independent testing. Under 80,000 pounding cycles at SATRA in the UK, the blanketing lost 5.1% of its thickness against 17.2% for bulked polyester. Air it regularly, wash it rarely and cold, and keep it in a cover, and it should long outlast a synthetic duvet.
Yes, on every size. Reinforced cotton loops are sewn into all four corners. Tie your cover's internal ties to them and the inner stays flat from edge to edge instead of sliding into a ball at the bottom.
Yes. Use the corner loops and something simple from around the house, like yarn or ribbon.
This is what people who buy both weights do. The 200gsm on its own through summer, the 350gsm on its own through most of winter, and the two tied together for the coldest weeks. We would not go heavier than a 200gsm and a 350gsm together.
Yes. We have been making these wool duvets since 2023. When we launched Do Not Disturb in 2025 we introduced a new sleep mask and pillow system, but we could not improve on the duvet, so it carried over unchanged.
