The airiest
Cloud Heaven Duvet
Tall, fluffy folds you can’t wait to get under.
From Was $1,239 now $739 Save $500
Free PureFlow cover + Lavender Pillow MistFree cover + pillow mist
Duvet Inserts
Duvet inserts in premium down that come with their cover: every YumeFeel duvet arrives with a PureFlow Duvet Cover cut to the same size, free for a limited time. Eight ties inside hold it square, so it stays in place.
Light as air
PureFlow Air Duvet
A lighter layer to curl into, for nights when you want less warmth.
From Was $889 now $529 Save $360
Free PureFlow cover + Lavender Pillow MistFree cover + pillow mist
Our rarest down
Royal Goose Down Duvet
Soft, lofty goose down to pull around you. Choose the warmth you love.
From Was $2,220 now $1,720 Save $500
Free PureFlow cover + Lavender Pillow MistFree cover + pillow mist
- Free coverwith each duvet, for a limited time
- 60 nightsto try it, free returns and exchanges
- Ships freeto the US and Canada
- 5 yearsLoft Promise on Heaven and Air, warranty on Royal
What size duvet insert fits my bed?
The one named for your mattress: Queen for a Queen or Full, King size for a King, Cal King for a California King. The cover comes in the same size, so there is nothing to match.
Inserts with their covers, US prices on 13 Nov 2026. The cover is free with each duvet for a limited time.
| Your mattress | Insert and cover, width × length | Duvet price | Cover alone |
|---|---|---|---|
| Queen 60 × 80 in, or Full | Queen 96 × 98 in (245 × 250 cm) | Heaven $739 Air $529 Royal $1,720 |
$219 |
| King 76 × 80 in | King 112 × 98 in (285 × 250 cm) | Heaven $769 Air $579 Royal $1,920 |
$239 |
| Cal King 72 × 84 in | Cal King 108 × 104 in (275 × 265 cm) | Heaven $799 Air $629 Royal $2,020 |
$259 |
Laid flat, each size reaches about 18 in past each side of its mattress. At 112 in wide, our King is an oversized King. Real drape varies with fill, mattress depth and who is under it, so check your own bed with the duvet size calculator.
Will the insert fit its cover, and stay put?
Yes. The PureFlow Duvet Cover is cut to fit Heaven, Air and Royal duvets in your size, so the two meet edge to edge.
You know the night: the duvet slides to your feet and you wake under an empty cover. Eight ties hold it square. They sit at the four corners and halfway along each edge, and each one knots to its partner on the duvet. Corner ties alone leave the long edges loose. The zip hides along the foot. On Royal, eight reinforced loops take the ties.
Should the insert be bigger than the cover?
No. Buy them the same size and let the down do the filling. Stuffing a bigger insert into a smaller cover is a popular trick. Measured, it buys very little.
"at most I've gained about half an inch"
Want more hang over the sides instead? Size up both pieces: a King insert in its King cover reaches about 26 in past each side of a Queen mattress, measured flat. Want a taller bed? Choose a fuller down duvet insert, not a wider one. The Cloud Heaven Duvet is the airiest, loved by thousands of dreamers, with tall, fluffy folds you can't wait to get under. To choose by feel, compare our down comforters.
Questions people ask
Does the insert come with a cover?
Yes. The Cloud Heaven Duvet, PureFlow Air Duvet and Royal Goose Down Duvet each arrive with a PureFlow Duvet Cover in your size, free for a limited time, and one free Lavender Pillow Mist. Pillows and sheets? Compare all sets.
Can I use my own duvet cover?
If it measures the same. Measure it flat, seam to seam, and compare it with the table. See sizing an insert for a King cover.
How do I get the insert into the cover?
Lay it in, knot each tie to its partner on the duvet, then close the zip at the foot. Step by step: how to put on a duvet cover.
King or Cal King?
Go by your mattress. Cal King is narrower at 108 in but longer at 104 in, like the mattress it fits. See King vs California King.
What if it is not right?
Send it back or swap it, free, within 60 nights. Heaven and Air carry our 5 year Loft Promise; Royal has its own 5 year warranty. When it does need a wash, follow how to wash a down comforter.
Who should buy something else?
Anyone with a Twin bed, or a cover they love in a size we do not make. We make Queen, King and Cal King only.
How this page was put together: sizes, prices and the offer read from our own store on 13 Nov 2026, US prices before code LOVE ($150 off orders of $500 or more). The half inch is Dianne Decor's measurement, not ours. New to inserts? Read duvet vs comforter and the duvet care guide.
