Quick Answer: Down duvets trap heat quickly and feel warmer on cold nights but can overheat variable sleepers. Wool duvets regulate temperature dynamically, staying warm when you are cold and releasing heat when you are warm. For Canadian climates with extreme temperature swings, wool is the more versatile year-round option.
In This Guide
Reading Time: 12 minutes
Down vs Wool: The Core Difference in How They Keep You Warm
Down and wool both insulate. But they do it in fundamentally different ways, and that difference matters more than most bedding guides explain.
How Down Works
Down clusters (the soft, fluffy undercoating beneath a bird's feathers) trap air in tiny pockets. Still air is an excellent insulator, so more trapped air equals more warmth. This is why fill power matters: higher fill power means each cluster traps more air, delivering more warmth per gram of down.
The result is a duvet that feels incredibly light while providing serious warmth. An 800-fill-power goose down duvet can keep you warm through a Canadian January night while feeling like almost nothing on top of you.
The downside: down traps heat in one direction. It holds warmth in, but it does not release it efficiently when your body temperature rises. If you tend to warm up during the night, down can leave you kicking covers off at 3 a.m.
How Wool Works
Wool fibres have a unique crimped structure that creates natural air pockets, similar to down. But wool adds something down cannot: active moisture management. Wool can absorb up to 30% of its own weight in moisture vapour without feeling damp, and it releases that moisture as your body temperature changes.
This creates a dynamic temperature regulation system. When you are cold, wool fibres trap warm air and insulate. When you start to warm up, the fibres release moisture and heat, cooling you down. It is the same principle that makes sheep comfortable in both freezing winters and warm summers.
The result is a duvet that keeps you in a narrower, more comfortable temperature range throughout the night. Less tossing, fewer wake-ups from overheating, more consistent deep sleep.
Why Temperature Regulation Matters for Sleep
Your core body temperature drops by approximately 1 to 1.5 degrees Celsius during sleep, reaching its lowest point around 4 a.m. This temperature drop is essential for maintaining deep sleep stages. A duvet that traps too much heat disrupts this natural cycle, causing micro-arousals that fragment sleep without fully waking you. Research consistently identifies bedroom temperature and bedding breathability as among the strongest environmental predictors of sleep quality.
8 min read
The Complete Duvet Comparison
| Property | Goose Down | Duck Down | Wool | Synthetic (Polyester) |
|---|---|---|---|---|
| Warmth-to-weight ratio | Best (lightest for warmth) | Very good | Good (heavier for same warmth) | Fair (heaviest) |
| Temperature regulation | Moderate (traps heat) | Moderate (traps heat) | Excellent (dynamic) | Poor (traps heat) |
| Moisture wicking | Moderate | Moderate | Excellent (up to 30% of weight) | Poor |
| Allergy friendly | Can trigger allergies | Can trigger allergies | Naturally hypoallergenic | Hypoallergenic |
| Dust mite resistance | Low (down traps dust mites) | Low | High (naturally resistant) | Moderate |
| Lifespan | 15-20 years | 10-15 years | 15-25 years | 3-5 years |
| Weight feel | Light, cloud-like | Light to medium | Medium, grounding | Heavy, flat |
| Canadian climate suitability | Excellent for cold, less for humid summers | Good for cold | Excellent year-round | Adequate for cold only |
| Price range (Queen) | $300-$800+ | $150-$400 | $200-$500 | $40-$150 |
| Ethical concerns | Live plucking possible (check certification) | Live plucking possible | Shearing (not harmful when done properly) | Petroleum-based |
Brad, Owner, 40+ years of experience: "The question I get most is 'which is warmer, down or wool?' And the honest answer is: down is warmer per gram. But that is the wrong question. The right question is 'which keeps me comfortable all night?' And for most people in Ontario, where we go from minus twenty to plus thirty over the course of a year, wool is the more practical choice. It handles the temperature swings better. Down is wonderful if you sleep cold every night. But most people do not sleep at one temperature all night."
Goose Down vs Duck Down: What Actually Matters
If you decide down is right for you, the next question is goose or duck. The industry treats this as a major distinction. The reality is more nuanced.
Fill Power Is What Matters, Not the Bird
Fill power measures the volume of space one ounce of down occupies. Higher fill power means larger, fluffier clusters that trap more air. The maximum fill power for goose down is approximately 1,000, while duck down maxes out around 800. This is because geese are larger birds with bigger down clusters.
But here is what matters: at the same fill power, goose and duck down insulate equally well. A 700-fill-power duck down duvet performs identically to a 700-fill-power goose down duvet in terms of warmth. The insulating mechanism is the same.
| Fill Power | Quality Level | Available In | Best For |
|---|---|---|---|
| 500-550 | Entry level | Duck down | Budget-conscious, mild climates |
| 600-650 | Good quality | Duck or goose | Most Canadian bedrooms |
| 700-750 | High quality | Duck or goose | Cold sleepers, unheated rooms |
| 800-850 | Premium | Goose only | Maximum warmth, minimum weight |
| 900+ | Ultra-premium | Goose only (Eider, Hutterite) | Luxury, extreme cold |
Where Goose Down Genuinely Wins
Odour: Goose down tends to have less odour than duck down due to dietary differences. Ducks have a more varied diet that can transfer subtle smells to the down. Quality processing minimises this, but it is a factor in budget products.
Longevity: Goose down clusters are larger and more resilient, maintaining their loft slightly longer over years of use. A high-quality goose down duvet can maintain its performance for 15-20 years.
Ultra-high fill power: If you want the lightest possible duvet with maximum warmth (800+ fill power), goose is your only option. Duck down simply does not reach those fill power levels.
Where Duck Down Makes More Sense
Value: At the 600-700 fill power range (which is excellent for most Canadian homes), duck down offers identical warmth at a lower price. You are paying for the bird's name, not for better insulation.
Availability: Duck down is more readily available and more sustainably sourced in many cases, as ducks are raised in greater numbers worldwide.
Allergies and Health Considerations
This is where wool pulls decisively ahead of down for many Canadian sleepers.
Down and Dust Mites
Down's fluffy structure creates an ideal habitat for dust mites, which are the primary allergen trigger for millions of Canadians. Dust mites thrive in warm, moist environments and feed on dead skin cells. Down duvets provide exactly these conditions. While high-quality down is washed and sanitised during processing, dust mites recolonise over time.
Wool, by contrast, is naturally resistant to dust mites. The lanolin residue in wool fibres creates an environment that mites avoid. Wool's moisture-wicking properties also keep the duvet drier, further discouraging mite populations. For asthma and allergy sufferers, wool is the safer natural fill.
Who Should Choose Wool
- Anyone with dust mite allergies or asthma
- Sleepers who experience night sweats
- Couples where one sleeps hot and one sleeps cold
- Anyone who prefers a slightly heavier, grounding feel
- Eco-conscious buyers (wool is renewable and biodegradable)
Who Should Choose Down
- Sleepers who run cold and want maximum warmth
- Those who prefer an ultra-light, cloud-like feel
- Sleepers without dust mite allergies
- Anyone willing to invest in regular professional cleaning
Canadian Climate Performance
Canada's climate is the ultimate test for bedding. Southern Ontario specifically sees temperature ranges from -25 degrees Celsius in January to +35 degrees Celsius (with humidity) in July. Your duvet needs to handle both extremes, or you need two duvets.
The One-Duvet Solution
Wool is the closest thing to a year-round duvet in Canada. Its dynamic temperature regulation handles the transition from a heated winter bedroom (typically 18-22 degrees Celsius) to a warm summer night without air conditioning. Many of our Brantford customers use a medium-weight wool duvet year-round and find it comfortable in every season.
The Two-Duvet Solution
If you prefer down, consider a seasonal approach: a heavier down duvet (700+ fill power, winter weight) for October through April, and either a lightweight down duvet or just a flat sheet with a light blanket for summer. This is more common in Canadian households and works well if you do not mind the storage and seasonal swap.
Brantford Climate Context
Brantford sits in a humid continental climate zone. Winter nights regularly drop below -10 degrees Celsius, while summer humidity can make 25-degree nights feel stifling. This humidity factor is particularly relevant: down absorbs moisture slowly and dries slowly, which can make it feel clammy on humid July nights. Wool's rapid moisture management handles Brantford's summer humidity significantly better.
Visit Mattress Miracle at 441 1/2 West Street to feel both wool and down duvets. Since 1997, we have helped families in Brantford and surrounding areas find bedding that works for our specific climate.
Care and Longevity
| Care Aspect | Down Duvet | Wool Duvet |
|---|---|---|
| Washing frequency | 1-2 times per year (with duvet cover) | 1-2 times per year (with duvet cover) |
| Washing method | Professional cleaning recommended, or large-capacity front-load washer | Some machine washable (check label), others professional clean |
| Drying | Tumble dry low with tennis balls to restore loft (takes hours) | Air dry flat (can take 24-48 hours) |
| Fluffing | Regular fluffing needed to redistribute clusters | Minimal fluffing needed (wool holds shape) |
| Airing | Air outside monthly to release moisture | Air outside monthly (wool self-cleans to a degree) |
| Lifespan with proper care | 15-20 years (goose), 10-15 years (duck) | 15-25 years |
| Common problems | Clumping, flat spots, down leakage, odour | Can feel heavy, may shrink if washed improperly |
Both types benefit significantly from using a duvet cover. The cover takes the daily wear and the skin contact, keeping the duvet itself clean and extending its life. With a cover, you wash the cover weekly (like sheets) and the duvet itself only once or twice a year.
Dorothy, Sleep Specialist: "The biggest mistake people make with duvets is not using a cover. They buy a beautiful down duvet and put it directly on the bed. Within a year, it needs professional cleaning because it is absorbing body oils and sweat directly. Always use a duvet cover. It is like putting a case on your phone. It protects the investment."
Which Duvet for Your Sleep Style
Match Your Duvet to How You Sleep
- You sleep cold: High fill power goose down (700+). It provides the most warmth for the least weight. Pair with a flannel duvet cover in winter.
- You sleep hot: Wool. Its dynamic temperature regulation prevents the overheating that down can cause. You will not wake up kicking covers off.
- You and your partner disagree on temperature: Wool. It adjusts to each body independently, so the warm sleeper cools down while the cold sleeper stays warm under the same duvet.
- You have allergies: Wool, without question. Naturally dust-mite resistant and hypoallergenic. No chemical treatments needed.
- You want the lightest feel: Goose down (800+ fill power). Nothing feels as light while delivering real warmth. It is the cloud experience.
- You want the best value: Duck down (600-650 fill power) for cold sleepers, or wool for year-round use. Both offer excellent performance at reasonable prices.
- You want one duvet for all seasons: Wool. It is the only natural fill that genuinely works year-round in Canadian climates without overheating in summer or underperforming in winter.
Ethical Considerations
Both down and wool raise ethical questions worth addressing honestly.
Down: The primary concern is live plucking, where down is harvested from live birds during moulting season. This practice is controversial and banned in some countries. Look for Responsible Down Standard (RDS) certification, which ensures down is sourced as a byproduct of the food industry, not from live-plucked birds.
Wool: Wool is harvested by shearing, which does not harm the animal when done properly. Sheep need to be sheared for their own health, as their wool grows continuously. Look for Responsible Wool Standard (RWS) certification for ethical assurance.
Both materials are natural, biodegradable, and renewable. Both are significantly more sustainable than synthetic polyester fill, which is petroleum-based and non-biodegradable.
Duvet Options at Mattress Miracle
Mattress Miracle carries both down and wool duvets in our Brantford showroom. The advantage of buying bedding in person rather than online is simple: you can feel the weight, the loft, and the texture before you commit.
Browse our full duvet selection at mattressmiracle.ca/collections/duvets or visit our Miracle Sleep Collection for our curated natural bedding range.
Talia, Showroom Specialist: "When someone cannot decide between down and wool, I hand them both and let them hold them for a minute. Down feels like holding a cloud. Wool feels like holding a hug. People usually know instantly which one they want once they feel the difference. That is why coming into the store matters for bedding. You cannot feel weight and loft through a screen."
Visit Our Brantford Showroom
We are located at 441½ West Street in downtown Brantford. Free parking available. Our team does not work on commission, so you get honest advice based on your needs.
Mattress Miracle, 441½ West Street, Brantford, ON · (519) 770-0001
Hours: Monday–Wednesday 10am–6pm, Thursday–Friday 10am–7pm, Saturday 10am–5pm, Sunday 12pm–4pm.
Our Canadian down duvet picks
If you land on down, here is our European white duck down line, made in Canada with a 15-year warranty.
- Cordoba 600 Loft White Duck Down Duvet, 233TC entry-level European duck down, best value, from $238
- Grenoble 800 Loft White Duck Down Duvet, 800 loft flagship duck down, 500TC swiss-dot sateen shell, from $466
- Shop all Highland Feather down duvets →, the full goose and duck down range, made in Canada