Quick Answer: You can identify a good 135×200 down duvet by three characteristics: down content (at least 60%, ideally 90%), fill power (at least 120 mm according to DIN EN 12130), and certifications (Oeko-Tex Standard 100 Class 1, Downpass). Whether you need a summer, all-season, or winter duvet depends on your warmth requirements. Pay attention to box-stitching instead of baffled-stitching — it prevents down from shifting and cold spots from forming. A high-quality goose down duvet lasts 10 to 15 years with proper care.
You want to buy a down duvet — but the selection is overwhelming. 60% or 90% down content? Summer, winter, or all-season? Baffled or box-stitched? And what do Downpass, NOMITE, and fill power actually mean?
This buying guide provides you with all the criteria you need for an informed decision. No marketing jargon, but measurable quality features and concrete figures from our production.
We have been producing down duvets in Germany since 1994 — from light summer duvets to thick winter duvets. In our quality control, we check every down batch for fill power, purity, and odor. We pass this knowledge on to you in this guide — regardless of where you ultimately make your purchase.
Last updated: April 11, 2026
Contents
- Why 135×200 cm is the right size
- Fill Power and Down Content: The two most important quality features
- Down vs. Goose Down: What’s the difference?
- Summer, All-Season, or Winter — choosing the right warmth level
- Comparison Table: BEFA Down Duvets at a Glance
- Box Stitching vs. Baffled Stitching Explained
- Certifications: What to look for
- Caring for a Down Duvet: How to maintain quality
- Our Down Duvets for Every Season
- Frequently Asked Questions
Why 135×200 cm is the right size
The size 135×200 cm is the standard German size for single duvets. It fits all commercially available bedding sets and fully covers individuals up to 180 cm tall. For taller sleepers, we recommend the comfort size 155×220 cm — more on this in our size guide.
Why is size relevant when buying? Because all quality specifications — fill weight, price, thermal performance — refer to the duvet size. A 135×200 down duvet with 250 g filling is a summer duvet. The same 250 g in a 240×220 would be far too little. Size determines how much down is distributed per square meter — and thus the thermal performance.
Fill Power and Down Content: The two most important quality features
Fill Power (Loft)
Fill power indicates how much down fluffs up again after compression. It is measured according to DIN EN 12130 and specified in millimeters. The higher the fill power, the better the down insulates for the same weight.
- Below 100 mm: Low quality. The duvet quickly loses loft and needs to be replaced sooner.
- 100–119 mm: Solid quality for price-conscious buyers.
- Above 120 mm (Class 1): High quality. Maximum thermal performance with minimal weight. Lifespan 10–15 years.
From our production: We measure the fill power of every incoming down batch with a standardized test cylinder according to DIN EN 12130. We only use batches with at least 120 mm fill power for our 90% down duvets. Batches below this value are not processed. This costs more — but you will feel the difference after the first shake-out.
Down Content: 60% vs. 90%
Down content indicates what percentage of the filling consists of down (the fine plumules) and what percentage consists of feathers. The difference is greater than the numbers suggest:
- 90% Down / 10% Feathers: Extremely light and fluffy. Regulates moisture and temperature better. Feels soft and conforming. The duvet adapts to the body.
- 60% Down / 40% Feathers: Slightly heavier for the same thermal performance. The higher feather count gives the duvet more structure and weight. For those who prefer a noticeable weight on their body, this can be an advantage.
The rule of thumb: The higher the down content, the lighter the duvet for the same thermal performance. A 90% down duvet with 500 g fill weight provides comparable warmth to a 60% down duvet with 700–800 g.
From our production: The down content is tested according to DIN EN 12934. For a declared "90% down duvet," a tolerance of up to 5% is allowed according to the standard — so the actual filling can be between 85% and 95%. Our quality control ensures that the actual down content is always above the declared value.
Down vs. Goose Down: What’s the difference?
The question "Which is better, down or goose down?" is one we hear frequently — it's based on a misunderstanding. All goose down is down. The term "down" includes both duck and goose down. The relevant distinction is:
- Duck Down: Smaller clusters, slightly lower fill power. Cheaper to procure. Very good quality is possible, especially with a high down content (90%).
- Goose Down: Larger clusters, higher fill power per cluster. Geese are larger than ducks — their down has longer barbs and traps more air. The result: an even lighter, fluffier duvet. Premium segment.
For most sleepers, a high-quality duck down duvet with 90% down content and fill power over 120 mm is perfectly sufficient. Goose down offers a noticeable difference in lightness and loft — but the price premium is also noticeable. A goose down duvet is worthwhile if you are looking for maximum lightness with the highest thermal performance.
Summer, All-Season, or Winter — choosing the right warmth level
The warmth class of a 135×200 down duvet is determined by the fill weight. More grams means more insulation. What you need depends on three factors: room temperature in the bedroom, personal warmth perception, and season.
Summer Down Duvet (Warmth Class 1–2)
Fill weight: 200–300 g in 135×200. For room temperatures from 18 °C. Light, breathable, wicks away sweat instead of trapping it. The right choice from April to September. Read more about summer duvet materials in our material comparison.
All-Season Down Duvet (Warmth Class 3)
Fill weight: 500–700 g in 135×200. The all-rounder for bedrooms with a constant temperature (16–20 °C). A compromise — a bit too warm in high summer, a bit too light on very cold winter nights. For most German bedrooms with heating, this is the most practical solution.
Winter Down Duvet (Warmth Class 4–5)
Fill weight: 800–1,200 g in 135×200. For room temperatures below 16 °C and people who get cold easily. The baffles are higher (5–8 cm) to trap more air. If you don't or barely heat your bedroom in winter, you need this warmth class.
Comparison Table: 135×200 Down Duvets at a Glance
| Criterion | Summer (90 %) | All-Season (90 %) | Winter (90 %) | All-Season (60 %) |
|---|---|---|---|---|
| Fill Weight (135×200) | 250 g | 600 g | 900 g | 700 g |
| Warmth Class | 1–2 (light) | 3 (medium) | 4–5 (warm) | 3 (medium) |
| Room Temperature | From 18 °C | 16–20 °C | Below 16 °C | 16–20 °C |
| Down Content | 90 % | 90 % | 90 % | 60 % |
| Fill Power | Min. 120 mm | Min. 120 mm | Min. 120 mm | Min. 100 mm |
| Stitching | Flat Box | Box 3–4 cm | Box 5–8 cm | Box 3–4 cm |
| Washable | Up to 60 °C | Up to 60 °C | Up to 60 °C | Up to 60 °C |
| Season | April – September | All-season | October – March | All-season |
Down Duvet 90% Down – All-Season
The all-rounder for year-round use. 600 g fill weight in 135×200 cm, Class 1 down, Oeko-Tex Standard 100 and Downpass certified. Box-stitched, washable at 60 °C. Made in Germany.
From €169.95
View NowBox Stitching vs. Baffled Stitching Explained
The stitching determines how the down remains distributed in the duvet. It directly influences thermal performance and lifespan. Two variants dominate the market:
Baffled Stitching (Quilted-Through)
The top and bottom layers of the duvet are sewn directly together. The down cannot move from one baffled square to the next. Disadvantage: No loft is created at the seams — so-called cold spots occur. Heat escapes at these points. Baffled stitching is therefore only suitable for light summer duvets, where the cold spots are even desirable because they dissipate heat.
Box Stitching (Internal Baffles)
Fabric baffles are sewn between the top and bottom layers, forming chambers. The down fills the entire height of the baffle — no cold spots, even heat distribution. The baffle height varies depending on the intended use:
- 2–3 cm: Summer duvets — flat, light, good air circulation
- 3–4 cm: All-season duvets — balanced insulation
- 5–8 cm: Winter duvets — high air volume, maximum warmth
From our production: All our down duvets from the all-season category upwards feature box stitching with internal baffles. The baffles are individually sewn in — this is more complex than baffled stitching but reliably prevents the down from migrating to a corner over the years. This is precisely the most common quality defect in cheap down duvets: after two years, the down is at the bottom, and the top half is empty.
Certifications: What to look for
Three certifications are relevant for a 135x200 down duvet — they tell you more about its quality than any marketing text:
Oeko-Tex Standard 100 (Class 1)
Tests the finished article for harmful substances. Class 1 is the strictest level — it applies to textiles suitable for babies and toddlers. This means: the cover fabric, the down filling, and all dyes used have been tested for over 100 substances. Our down duvets carry this seal.
Downpass
The Downpass certifies that the down does not come from live-plucking or force-feeding. The entire supply chain is independently audited annually — from the farm to the finished product. For BEFA, this has been standard for years: we only process Downpass-certified down.
NOMITE
The NOMITE label identifies duvets and pillows suitable for house dust mite allergy sufferers. The casing (the cover fabric) is so tightly woven that mites cannot penetrate. NOMITE-certified down duvets are a safe choice for allergy sufferers.
Caring for your down duvet: How to maintain quality
A high-quality down duvet lasts 10 to 15 years — if you care for it properly. The most important rules:
- Shake daily: In the morning, shake the duvet vigorously so that the down distributes evenly and moisture can escape.
- Ventilate regularly: Every 2–4 weeks, hang the duvet over a chair or balcony railing. Not in direct sunlight — UV radiation damages the cover fabric.
- Washing: 1–2 times a year at a maximum of 60 °C on a gentle cycle. Use liquid mild detergent, no fabric softener. Tumble dry at low temperature with 2–3 tennis balls to fluff up the down.
- Storage: Always store down duvets in an airy place (cotton bag), never in plastic bags or vacuum bags — the down needs air.
You can find detailed step-by-step instructions in our guide Washing a Down Duvet.
Our down duvets for every season
Frequently Asked Questions
How many grams of down should a good down duvet have?
That depends on the season. For a 135x200 down duvet: summer duvet 200–300 g, all-season duvet 500–700 g, winter duvet 800–1,200 g. Not only the weight is crucial, but also the down content: 250 g of high-quality 90% down provides better warmth than 400 g of a 60% mixture.
How much should a good down duvet cost?
A high-quality 135x200 down duvet with 90% down content, Oeko-Tex and Downpass certification ranges between 100 and 250 Euros — depending on the warmth class. Duvets under 50 Euros usually contain inferior down with low fill power or a low down content. More expensive models with goose down are in the premium segment.
What should you consider when buying a down duvet?
Three criteria are crucial: down content (at least 60%, preferably 90%), fill power (at least 120 mm for long-lasting quality), and certifications (Oeko-Tex Standard 100, Downpass for ethical sourcing). Additionally, choose the correct warmth class for your sleeping habits and cassette stitching instead of box stitching.
What is better — down or goose down?
Goose down is a subtype of down. So the comparison is "duck down vs. goose down". Goose down has larger clusters and higher fill power — it is lighter and loftier for the same warmth performance. The price difference is 20–40%. For most sleepers, a high-quality duck down duvet with 90% down content is perfectly sufficient.
How do I recognize a good down duvet?
Look for: stated fill power according to DIN EN 12130 (at least 120 mm), certifications (Oeko-Tex, Downpass, possibly NOMITE), a high down content (90% instead of 60%), and cassette stitching. A tightly woven, slightly rustling casing indicates high-quality cover fabric. And: shake the duvet — good down lofts immediately and evenly.
Is 100% goose down good?
100% down content sounds like the maximum, but it's not always better. A small admixture of 10% support feathers gives the duvet some stability and prevents the filling from compacting too much. The 90/10 blend common in Germany is the optimal compromise between lightness, loft, and shape retention for most applications.
Can you wash a down duvet in the washing machine?
Yes. Most high-quality down duvets are washable at 40–60 °C on a gentle cycle. Use a mild liquid detergent, no fabric softener. Then tumble dry at low temperature with tennis balls. Detailed instructions can be found in our care guide.
Which down duvet is suitable for allergy sufferers?
Down duvets with NOMITE certification are suitable for house dust mite allergy sufferers. The casing is so tightly woven (thread count over 280 threads/cm²) that mites cannot penetrate. Additionally, the duvet should be washable at a minimum of 60 °C to regularly remove any remaining mite allergens.