JavaScript seems to be disabled in your browser. For the best experience on our site, be sure to turn on Javascript in your browser.

Extra Warm British Wool Duvet - 900gsm 14+ TOG

From £140.00 £175.00

Enjoy 20% Off Our Luxury Handcrafted Bedding

Sitewide offer on our naturally luxurious, handcrafted bedding.
Excludes Bespoke & our Sleep Spiral. Shop the Collection

Pay in 3 interest-free instalments

Free delivery over £50

Handcrafted in Devon

5 Years Maker Guarantee

Free Delivery
over £50

Ethically Made
in the UK

5 Years Maker
Guarantee

Individually
Handcrafted

Temperature
Regulating

No Chemicals
Used

Handcrafted in Devon

We care about your sleep

We care about the planet

Friendly customer service

Product Information

British Wool Duvet – Extra Warm Winter Weight 900gsm

Stay snug through the coldest nights with our Extra Warm British Wool Duvet, lovingly handcrafted in Devon. Filled with 900gsm of certified British wool and encased in soft 260 thread count cotton, this is our warmest and most insulating option. With a tog equivalent of 14+, it’s perfect for frosty winters, draughty homes, or for those who prefer sleeping with the heating off.

Why Choose the Extra Warm Duvet?

This duvet is designed for those who crave extra cosiness. Wool naturally regulates temperature, keeping you warm while releasing excess heat to help prevent night sweats. Each duvet is stitched with minimal quilting, ensuring a smooth drape and preventing cold spots. It’s warmth without compromise – and made entirely from natural, sustainable materials.

Please note: At 900gsm, this duvet feels substantial. If you prefer something lighter but still cosy in winter, we recommend our Medium Weight British Wool Duvets.

Features & Benefits

Features

900gsm of 100% British wool – our thickest and most insulating duvet.
Encased in 260 thread count natural cotton, woven exclusively for Devon Duvets.
Certified by British Wool – every fibre traceable from farm to finish.
Handcrafted in Devon using minimal stitching for loft and drape.
Free from chemicals, glues, bonding agents or synthetic fibres.
All packaging reusable, recyclable or biodegradable.

Benefits

Ultimate winter warmth – approx TOG 14+, ideal for the coldest conditions.
Breathable and temperature regulating – cosy without overheating.
Hypoallergenic – naturally resists dust mites and micro-bacteria.
Low maintenance – keeps loft and shape without clumping.
Built to last – covered by our Devon Duvets 5-Year Guarantee.
Eco-conscious choice – renewable, biodegradable and sustainable.

Care Instructions

Air regularly to refresh and maintain loft.
Machine wash on a 30ºC wool cycle with a wool-safe detergent.
Gently spin, reshape while damp and air dry naturally.
Do not tumble dry or dry clean.

Tog Guide & Weight Comparison

Wool adapts to your body temperature, but as a guide:

Lightweight: 300gsm – Approx TOG 4–7
Medium Weight: 600gsm – Approx TOG 8–14
Extra Warm: 900gsm – Approx TOG 14+

This 900gsm Extra Warm duvet delivers the same insulation as combining a Lightweight and Medium Weight together – in one luxuriously thick cover.

Sustainability & Responsibility

We are proud to be the first UK bedding company accredited by British Wool, proving that 100% of our wool is British. Our fleeces are shorn in spring and summer when sheep naturally shed their coats. The cotton casing is sourced under the Better Cotton Initiative, supporting improved farming practices worldwide. Every duvet is natural, biodegradable and crafted to last – kind to you and kind to the planet.

Frequently Asked Questions

Is the Extra Warm Wool Duvet very heavy?

Yes - at 900gsm this is a substantial duvet. Many cold sleepers love the comforting weight and extra insulation, especially in draughty homes or during frosty winters. If you prefer something lighter, we recommend our Lightweight Wool Duvets or our Medium Weight British Wool Duvet.

Who is this duvet best suited for?

This duvet is perfect for people who feel the cold easily, live in cooler homes, or like to sleep with the heating off. Cold sleepers will appreciate the cocooning warmth and weight of the 900gsm fill, which provides a tog equivalent of 14+.

Will it make me too hot?

Wool is naturally breathable and helps regulate body temperature, so although this duvet is thick and warm, it still releases excess heat. If you are a naturally warm sleeper, one of our lighter options will likely suit you better.

Is this duvet sustainable?

Yes. Every duvet is filled with 100% British wool, certified by British Wool for full traceability back to UK farms. Wool is renewable, biodegradable and responsibly shorn in spring and summer when sheep naturally need their fleeces removed. The cotton casing is sourced under the Better Cotton Initiative, and our packaging is reusable and recyclable.

How should I care for such a thick duvet?

Air regularly to keep it fresh. For deeper cleaning, machine wash on a 30ºC wool cycle using a wool-safe detergent. Use a gentle spin, reshape while damp and air dry. Do not tumble dry or dry clean.

Does it come with a guarantee?

Yes - like all Devon Duvets products, it comes with our 5-Year Makers Guarantee. Each duvet is individually handcrafted in Devon to the highest standards for long-lasting performance and comfort.

Delivery Information

UK MAINLAND DELIVERIES

FREE delivery on orders over £50.

Delivery for orders under £50: £5.00

Dispatch Information:

Dispatch Days: Our dispatch days are Monday – Friday, excluding Bank Holidays, and deliveries are normally made on working days.

Dispatch Timing: We aim to dispatch orders on the same day if ordered before 12:30pm (Mon- Fri) and use a DPD Next (working) Day delivery service*. However, as each of our duvets, pillows and mattress toppers is individually handcrafted by our seamstresses in Devon, please bear in mind that during peak or busy periods, there may be a slight delay in the dispatch of your order.

*Please note: There are some areas within the UK where the actual delivery time will take longer (usually 2 - 3 days from dispatch). These include Northern Ireland, Scottish Islands, Scottish Highlands, Isle of Man, Isles of Scilly, Shetland and Channel Islands.

Bespoke Products: Bespoke products usually take no more than 2 weeks but timings will be given at the time of ordering.

Should the need arise, we reserve the right to select our carriers and /or third-party delivery services at our discretion to ensure timely and secure delivery of our products. This policy helps us maintain our commitment to service quality and efficiency.

Our Christmas Opening Hours:

As we all embrace the joy of the festive season, our team at Devon Duvets will also be taking a little time to rest, recharge, and enjoy precious moments with their families. We will be closed from 24 December to 28 December 2025 (inclusive), so our last day for pre-Christmas dispatches will be 23 December 2025.

A small Devon Duvets team will be available to respond to enquiries by telephone and email on Monday 29 and Tuesday 30 December, with a limited dispatch service. We will then be closed from 31 December 2025 to 4 January 2026 (inclusive), returning on Monday 5 January 2026, refreshed and ready to begin handcrafting our luxurious duvets, toppers and pillows once again.

MAINLAND EUROPE & REST OF WORLD

Please cont act us for further information.

Reviews

Care Information

Please note that the care instructions vary, depending on your duvet type. Please be sure to use the correct instructions for your duvet.

Caring for your 100% British Wool or 100% British Alpaca Duvet

Wool and alpaca fibres have a natural resistance to dust mites and bacteria, so your wool/alpaca duvet doesn’t need frequent washing. We recommend regular airing and this helps to keep the wool/alpaca nice and fresh. This can be done outside (if the weather is dry), or draped over a clothes airer, near an open window so that air can get right round your duvet.

Should a deeper clean be required, our wool and our alpaca duvets are machine washable - and it helps to think of them as a big woolly jumper! Machine wash in a large capacity machine (so the duvet has plenty of room to move around inside) on a 30 degrees wool cycle, and using a detergent that is specifically created for wool. A gentle spin to remove excess water and then remove immediately from the machine, reshape and thoroughly air dry. Do not tumble dry. We do not recommend dry cleaning as this process uses chemicals. You can find more information on caring for your duvet here.

If you need to store your duvet at any point, it is best to roll it up and place in the cotton bag it arrived in. Make sure it is stored in a dry place, away from humidity and damp. We would recommend re-airing before you use it again.

Caring for your Botanic (100% plant-based) duvet

Your Botanic duvet is made from a 100% plant based fibres containing TENCEL™Lyocell, derived from sustainable wood sources. These fibres have a resistance to dust mites and so your Botanic duvet does not require frequent washing. We do, however, recommend regular airing as this helps to keep your Botanic duvet fresh. This is best done outside if the weather is dry, or inside over an airer near an open window if the weather is damp.

For a deeper clean, your Botanic duvet can be machine washed in a large capacity machine, on a 30 degrees delicates cycle and using a gentle detergent (it is best to avoid 'biological' detergents as these can be harsh). A gentle spin to remove excess water and then remove immediately from the machine, reshape and air dry. Our Botanic duvets can be tumble dried on the lowest setting and we recommend reshaping during this process. We do not recommend dry cleaning, due to the chemicals used in this process.

For storing, roll up and place in the cotton bag it arrived in, ensuring it is stored in a dry place away from humidity and damp. Re-air before using again.

Size Guide

At Devon Duvets, we are dedicated to offering natural and sustainable, British wool filled duvets that are individually handcrafted with care in our workshops, in Devon. We offer standard UK duvet sizes for standard UK sized beds, but also offer sizes for those customers who may have purchased the slightly larger EU sized beds from those retailers that stock them. We have listed the options below.

Standard UK sized duvets are as follows:

Single Duvet: Width 135cm x Length 200cm

Double Duvet: Width 200cm x Length 200 cm

King Duvet: Width 225cm x 220 cm

Super King Duvet: Width 260cm x Length 220cm

Emperor Duvet: Width 290cm x Length 235cm (only available in British sheep's wool)

Standard EU sized duvets are as follows:

EU Single Duvet: Width 135cm x Length 200cm (Germany); Width 140xm x 200cm (France/Netherlands/Italy/Scandinavia) and Width 150cm x Length 220cm (Spain)

EU Double Duvet: EITHER Width 200cm x Length 200cm OR Width 220cm x Length 220cm

EU King Duvet: Width 240cm x Length 220cm

EU Super King Duvet: EITHER Width 260cm x Length 220 cm OR Width 260cm x Length 240cm

*BESPOKE SIZES: If you are interested in purchasing a bespoke sized duvet (i.e. a duvet size that differs from any of the above) then please get in touch with the team, providing details, and we will come back to you with a price and a lead time.

** SAFETY ADVICE: Duvets are not recommended for children under 12 months old. We would also recommend that only lightweight wool duvets should be used for children aged 1 to 8 years.