Down vs. Wool Duvets: Which Is Right for Your Sleep

Down and Wool are the two best-performing natural duvet fills on the market — and they're not interchangeable. Each insulates differently, suits a different kind of sleeper, and comes with its own maintenance routine. Understanding the difference before you buy saves you from a duvet that's too warm, too fussy to care for, or wrong for your allergies.

Here's how they actually compare.

How Down Insulates

Down is the soft, fluffy cluster found beneath a bird's feathers. Each cluster is three-dimensional, trapping pockets of air between thousands of tiny filaments. That trapped air is what creates warmth — the more air a cluster can hold, the warmer it sleeps for its weight. That trapping capacity is measured as fill power, and it's the single most important number when comparing down duvets.

Down's advantages:

• Best warmth-to-weight ratio of any natural fill. A high fill-power down duvet is dramatically lighter than a wool duvet offering the same warmth.
• Breathable and moisture-wicking, so it doesn't trap heat or feel stuffy.
• Long-lasting, with proper care — decades, not years.

The trade-off: down duvets generally require professional dry cleaning, and pure down can be a concern for people with allergies to animal proteins (though our down is hypoallergenic, sterilized, and RDS and DOWNMARK certified — see our Recycled Down vs. Recycled Polyester guide for more on how down is processed and certified).

For the full breakdown of goose vs. duck down and what "fill power" really measures, see our Goose vs. Duck Down guide.

How Wool Insulates

Wool works on a completely different principle. Its fibres are naturally crimped, creating tiny air pockets along the length of each strand rather than in a single cluster. That structure gives wool something down can't fully replicate: active temperature regulation. Wool fibres respond to your body's temperature and moisture output throughout the night, pulling in heat when you're cool and releasing it — along with moisture — when you're warm.

Wool's advantages:

• Machine washable (in the case of our Washable Wool Duvet) — a real advantage over down's dry-clean-only care.
• Naturally hypoallergenic and dust-mite resistant, since wool fibres don't carry the proteins that trigger down allergies.
• Naturally fire-resistant, without chemical treatment.
• Genuinely temperature-regulating year-round — warm in winter, cool in summer, without needing seasonal duvet swaps.

The trade-off: wool is heavier for the same warmth, and it doesn't hit the ultra-light, high-loft feel that a high fill-power down duvet delivers.

Down vs. Wool at a Glance

Choosing Your Down Fill Power

If down is the right choice for you, the next decision is fill power — how much loft, and therefore warmth, the down delivers. Higher fill power means more warmth for less weight, not just "more down."

Shell fabric scales with the duvet too: entry-level fill powers typically come in a 240 or 280 thread count percale shell, while our higher fill-power duvets are wrapped in a smoother 400 thread count sateen cotton shell.

On a budget, or shopping for a guest room? Our Feather & Down and Goose Down & Feather blends combine a smaller percentage of down with feather for a lower price point and firmer loft — a practical option when ultra-light warmth isn't the priority.

Our Washable Wool Duvet

Filled with 100% pure Australian virgin wool inside a 233 thread count cotton percale shell, our Washable Wool Duvet — also known as the Australian Wool Duvet — is OEKO-TEX® STANDARD 100 certified and made with no chemical treatment. It's naturally breathable, moisture-wicking, hypoallergenic, and, unlike a down duvet, fully machine washable. For allergy sufferers or anyone who wants one duvet that works through every season without a trip to the dry cleaner, it's a compelling alternative to down.

Read our full Washable Wool Duvet review for a closer look.

Which Should You Choose?

Choose down if:

• You want the lightest, loftiest warmth possible.
• You sleep cold and want a duvet you can size up in fill power.
• You're comfortable with occasional professional cleaning.

Choose wool if:

• You want a duvet you can machine wash at home.
• You have allergies or sensitivities to Down.
• You want one duvet that adapts across every season.
• You run warm and want active moisture-wicking overnight.

Frequently Asked Questions

Is Wool warmer than down?

Not for its weight. Down has the best warmth-to-weight ratio of any natural fill, so a Down duvet delivers more warmth at a lighter weight. Wool insulates differently — through moisture-wicking, temperature-adaptive fibres — and can feel just as warm, but at a heavier weight.

Is a Wool duvet good for allergies?

Yes. Wool doesn't contain the animal proteins that trigger most down allergies, and it's naturally resistant to dust mites, making it one of the most allergy-friendly duvet fills available.

Can I wash a down duvet at home?

No — Down duvets should be professionally dry cleaned by a Down specialist to preserve their loft and structure. This is one of the clearest practical differences between down and our Washable Wool Duvet, which is machine washable.

What fill power should I choose for a Canadian winter?

For most Canadian bedrooms, 650+ to 700+ fill power covers year-round comfort. For colder bedrooms or maximum winter warmth, 800+ to 850+ fill power delivers the most warmth with the least weight.

Is Down or Wool better for hot sleepers?

Wool's moisture-wicking properties make it a strong choice for hot or restless sleepers, since it actively pulls moisture away from the body overnight. A lower fill-power, all-season down duvet is also breathable and can work well, but wool has the edge for active temperature regulation.