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Down vs polyester duvet: which one should you buy

Down vs polyester duvet: down is lighter and warmer for its weight, while polyester is cheaper, easy to wash and better for allergy-prone sleepers.

Camille Laurent3 min read

A white duvet on a neatly made bed with two pillows
Image by DieterRobbins from Pixabay

Verdict: down wins on warmth for the weight and on lifespan, polyester wins on price, washing and allergy peace of mind. Most people who want a simple, low-fuss bed are fine with polyester.

Down vs polyester duvet is a trade between a natural fill and an easy-care one. Down is the soft layer under a bird's feathers. Polyester is a man-made fibre packed into a fluffy fill.

Which wins on

FactorDownPolyester
Warmth for weightDown. Warm without heavinessHeavier for the same warmth
PricePolyester. Typically $Down is usually $$ to $$$
WashingPolyester. Many go in the machineDown needs care and long drying
LifespanDown. Often lasts many yearsPolyester can go flat sooner
AllergiesPolyester. Often easier to wash hotSome people react to down
BreathabilityDownDown
Ethical sourcingCheck labels for responsible downPolyester is oil based

Pick down if

  • You want warmth without weight.
  • You plan to keep it for many years.
  • You sleep hot and want a fill that breathes.
  • You can wash it carefully or pay for cleaning.

Pick polyester if

  • You want a lower price.
  • You wash bedding often.
  • You have allergies or asthma, or share with someone who does.
  • The bed is for guests or children.

How to read the label

Warmth is often given as a tog rating, where a higher number means warmer. A summer duvet is typically low, a winter one is high. The right number depends on your room and how warm you sleep.

For down, look at the fill power, a measure of how much space an ounce takes. Higher numbers usually mean more loft for the weight. Check the maker's notes on how the down is sourced.

A hand pressing the top of a fluffy white duvet
A good fill springs back when you press itPhoto by Ron Lach on Pexels

Worked example

Say you pay $ for a polyester duvet that you wash twice a year and replace every three or four years. Say you pay $$$ for a down duvet you keep for ten years. Spread over those years, the gap can narrow. If you move often, the $ one is the safer choice.

The difference that matters

Washing and allergies. If either is a problem, choose polyester. If neither is, choose down for comfort over time. Allergy issues are a medical matter, so talk to a doctor or an allergy specialist about bedding.

Caution

Polyester can trap heat in some sleepers. Down can lose loft if it stays damp. Always dry a washed duvet fully. For the rest of the bed, see memory foam vs hybrid mattress.

Common mistakes

  • Buying by tog alone and ignoring how warm your room is.
  • Skipping a duvet cover, so the duvet needs washing more.
  • Putting a damp duvet back on the bed.
  • Buying down without checking where it comes from.

For the layer under you, see mattress topper or new mattress.

Quick questions

Is down warmer than polyester?

For the same weight, yes. Polyester can be as warm but is usually heavier.

Which duvet is best for allergies?

Many people choose polyester because it can be washed hot. Ask a doctor for advice on allergies.

How long does a down duvet last?

With care, often many years. Polyester usually lasts fewer.

Can I machine wash a down duvet?

Some can, if the label says so and the machine is big enough. Dry it fully.

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