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Down Comforters, Explained

After reading, you'll understand how fill power, down percentage, fill weight and construction decide how warm and light a down comforter is.

Updated September 25, 2026 · Companion to our Home & Kitchen review

Brooklinen Down Comforter - our top pick
In this guide

Down comforters are sold on words like fluffy and luxurious, but the useful information is in a few numbers. Fill power, down percentage and fill weight tell you almost everything about warmth and weight. Construction tells you whether that warmth stays even. Here is how to read the listing.

The 30-second version

  • Down percentage matters most, because a feather-heavy fill is not a down comforter.
  • Fill power measures quality, with higher numbers giving more loft per ounce.
  • Fill weight measures warmth, so choose it for your bedroom temperature.
  • Baffle boxes keep down even, while sewn-through stitching leaves cold lines.
  • RDS covers animal welfare, and OEKO-TEX covers harmful substances.

The products this guide is about

Our verdict on each, with the full reasoning on the companion review.

What actually matters

  • Down content - the percentage of down clusters. The rest is feathers or fibres, which are heavier and less warm.
  • Fill power - how much space an ounce of down fills. 600 to 750 covers most good comforters.
  • Fill weight - total ounces of fill. More ounces at the same fill power means a warmer comforter.
  • Construction - baffle box, sewn-through or hybrid. It decides how the down lofts and stays put.
  • Shell - usually cotton sateen or percale. A tight weave keeps down from poking through.
  • Certifications - RDS and DOWNMARK for sourcing, OEKO-TEX for harmful substances. Look for certificate numbers.
  • Warranty and returns - a warranty of several years and a trial period are good signs.

The specs, in plain English

Fill powerThe volume, in cubic inches, that one ounce of down fills. Higher fill power means loftier, lighter warmth.
Fill weightThe total weight of the fill in ounces. It is the best guide to how warm a comforter will be.
Down clustersThe soft, quill-free undercoating of ducks and geese. They trap the most air for their weight.
Down fibreBroken bits of down clusters. They are less lofty and are often counted separately from clusters.
Feather fibreFragments of feathers, sometimes processed to remove quills. They are heavier and trap less warmth than down.
Baffle boxInner fabric walls that form boxes, letting down loft fully and stopping it from shifting.
Sewn-throughTop and bottom fabric stitched directly together. It is simpler and lighter, but heat escapes at the stitch lines.
RDSThe Responsible Down Standard, which certifies down comes from birds not subjected to unnecessary harm.

Green flags vs red flags

Green flags

  • A published down percentage of 75% or more.
  • A stated fill power.
  • Fill weights by size.
  • Baffle box construction.
  • RDS or DOWNMARK certification with a certifier named.

Red flags

  • "Down" in the name with a feather-heavy fill.
  • No down percentage at all.
  • Fill described as fibre rather than clusters.
  • A polyester shell on a premium claim.
  • No construction details.

Who's who: the brands

  • Brooklinen - A direct-to-consumer bedding brand with Canadian-made down comforters in three weights.
  • Parachute - A home brand known for European down inserts with published fill weights.
  • Ogallala Comfort - A US maker known for Hypodown, a blend of goose down and milkweed fibre.
  • Puredown - A budget bedding brand with down and feather comforters and pillows.

How to read a listing without getting fooled

Start with the fill breakdown and look for the percentage of down clusters. Then find the fill power and the fill weight for your size, and match the weight to how warm you sleep. Check the construction and shell fabric next, then the certifications and their numbers. Finally, read the warranty and returns terms, since a comforter takes a few nights to judge.

How much should you spend?

Budget comforters sold as down are often mostly feathers or fibres, in polyester shells with sewn-through stitching. Mid-range down comforters use real down clusters at 75% or more, cotton shells and baffle boxes. Premium and flagship comforters add higher fill power, goose down or special blends, long warranties and detailed sourcing.

Questions, answered

Duck down or goose down?

Goose down clusters are often larger, which can mean higher fill power, but good duck down performs very well. Fill power and down percentage matter more than the bird. Compare those numbers rather than the species.

Why does my down comforter poke me?

Feather quills or loose fibres are working through the shell. Feather-heavy fills and looser weaves do this more. A duvet cover helps, and pulled fibres should be pulled back in rather than out.

How long does a down comforter last?

A good one can last well over a decade with a duvet cover and occasional airing. Loss of loft and clumping are signs it needs cleaning or replacing. Store it in a breathable bag, not plastic.

Are down comforters good for allergies?

Many people who react to down are actually reacting to dust mites or poorly cleaned fill. Well-washed, certified down and a tight cotton shell help. If you are sensitive, a hypoallergenic blend or down alternative is safer.

Ready to choose? See our top pick, the alternatives, and the one we'd skip See the Down Comforters verdicts

Or jump to the head-to-head: Brooklinen Down Comforter vs Parachute Down Duvet Insert.

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