Every pillow here opens
A moulded pillow picks your height before you buy it, and if it is wrong by an inch there is nothing to be done. Every Circadian pillow has a full-length zipper, arrives full, and lets you take it down to yours on the first night.
Every pillow we make is adjustable, and it is the feature people end up valuing most. Each one arrives about a third fuller than most people keep, because it is far easier to take material out than to wish you had more. Open the side zipper, remove material until your head sits level with your shoulders, and keep what you took out in case you want it back. Buckwheat and latex are the easiest to set exactly, because you are moving loose pieces rather than fiber.
The zipper is standard across the collection. What changes is how the material behaves when you move it, which is worth knowing before you choose.
Scoop hulls into a bowl a handful at a time. Nothing else here lets you land on an exact height as easily, and it holds whatever you set.
Best for people who want the height exactly right
Take pieces out to lower it or add a refill bag to build it taller. It keeps settling past the first night, so give this one a few weeks.
Best for setting a height and having it spring back all night
Each chamber opens separately, so the buckwheat side and the wool side can sit at different heights. Most people end up with exactly that.
Best for anyone who wants two pillows in one cover
Pull out handfuls of cotton until it is right. Because the fiber is dense, the height you set is the height you keep for a long time.
Best for setting it once and forgetting about it
Wool comes in sheets rather than loose fiber. Peel a whole sheet off the outside of what is in there, never tearing pieces from the middle.
Best for warm sleepers adjusting in bigger steps
The easiest fill to take right down, which is why stomach sleepers end up here. It also needs a shake every few days to keep the height you set.
Best for sleepers who need the least height
Why the wrong height ruins a good pillow
Pillow reviews are full of people who bought a well-made pillow and hated it. Most of the time the pillow was fine and the height was wrong for that person, and there was nothing they could do about it.
1
A moulded or sewn-shut pillow ships at one height, chosen to be acceptable to the largest number of people rather than right for you.
2
Shoulder width, sleeping position and mattress firmness all move the number, and no two people land in the same place.
3
An arm under the pillow, a folded corner, a second pillow on top. Every one of those is a workaround for a number you were never allowed to set.
4
It goes in the cupboard and you buy another one at a slightly different fixed height, and the cycle runs again.
Give people the zipper and the whole problem disappears. You stop hunting for a pillow that happens to match you and start with one you set to yourself on the first night.
Night one
Every pillow ships with about a third more material than most people keep. That is a deliberate choice rather than generosity: removing material takes thirty seconds, and wishing you had more means waiting for a refill bag to arrive.
Open the side zipper, take material out into a bowl or a spare pillowcase, and lie down. Your head should sit level with your shoulders, not tipped up toward the ceiling or dropped toward the mattress. Keep whatever you removed, because plenty of people put some back a week later.
The two clocks
These get confused constantly, and confusing them is how people give up on a good pillow. Three nights is how long to sleep on a given height before you change the height again, because your neck needs a few nights to tell you anything useful about a new position.
Deciding whether the pillow is right for you is a different clock, and it runs in weeks. Latex in particular keeps settling well past the first night. That is exactly why the trial is sixty nights rather than thirty.
Later
Fiber pillows settle. That is what happens to anything compressed nightly for years, and it is normally the point at which a pillow gets thrown away and replaced.
Because these open, settling is a refill rather than a purchase. A bag of the same material through the same zipper brings the height back, and the cover long outlives the material inside it. It is the difference between owning a pillow for three years and owning one for ten.
All six open. Getting a feel for how the material moves saves you a fiddly first evening.
| Fill | How you adjust it | How fine the control is |
|---|---|---|
| Buckwheat | Scoop hulls into a bowl a handful at a time | The finest control of anything here, and it stays exactly where you set it |
| Tree-Tapped Latex | Lift pieces out, or add a refill bag to go taller | Fine, though it keeps settling for a few weeks after |
| Organic Cotton | Pull out handfuls of dense cotton | Moderate steps, and the setting lasts for years |
| Organic Wool | Peel a whole sheet off the outside of the wool | Bigger steps, because a sheet is a sheet |
| Wild-Harvested Kapok | Pull out fiber, then shake the pillow out | Fine, and it wants a fluff every few days to hold |
| Buckwool Hybrid | Two chambers, each opening on its own | Two independent heights in one pillow |
| Moulded foam | You cannot | None. One height, chosen by someone who has never met you |
Buckwheat. Loose hulls give you the finest control here, and once you stop scooping the height stays put.
Buckwheat Pillow ›Organic cotton. Dense fiber means the height you set on the first night is still there in a couple of years.
Organic Cotton Pillow ›Add a refill bag. Broad shoulders regularly need more than any pillow ships with, and building up is as easy as taking down.
Latex Refill ›Buy two and set them differently, or take the Buckwool Hybrid, which gives you two heights and two feels in one cover.
Buckwool Hybrid Pillow ›A pillow you can add material to or take material out of, rather than one sewn shut at a fixed height. Ours all have a full-length side zipper and arrive about a third fuller than most people keep, so you set the height on the first night.
Lie down the way you normally sleep and have someone look at you from the front. Your head should be level with your spine, not tipped up or dropped toward the mattress. Take material out until that is true, and stop.
There is no universal right answer, and the published research agrees. A 2021 review of the evidence found no single correct pillow height across sleepers. What matters is your own alignment: side sleepers usually need four to six inches, back sleepers less, stomach sleepers least of all.
Yes, which is why we tell people to keep what they remove. Put it in a bag or a spare pillowcase rather than throwing it away. Plenty of people take too much out on night one and add half of it back a week later.
Rarely, once you have found your height. Sleep three nights on a setting before changing it again while you are dialling it in. After that, revisit it if your mattress changes, if you change sleeping position, or if the pillow has settled below where you set it.
Yes. Every fill is sold as a refill bag, so you add material through the same zipper. Broad-shouldered side sleepers do this often, because standard pillow heights are built around an average shoulder.
You can use it as it arrives, and most people should not. It ships full, which for most people is taller than they want. Five minutes on the first night is the difference between a pillow that suits you and one that does not.
Differently from the others. Wool comes in sheets, so peel a whole sheet off the outside of what is in the pillow rather than tearing pieces out of the middle. Tearing from the middle leaves lumps you cannot smooth out afterwards.
Not if you take material off the outside rather than out of the centre, and give fiber fills a shake after adjusting. Buckwheat and latex cannot really go lumpy, since they are loose pieces that redistribute every time you move.
For most people, yes, and for a boring reason: neck pain is usually a height problem, and a fixed pillow only works if the factory's number happens to match your body. Being able to set it, and change it again at night forty, is worth more here than any particular fill.
Five minutes on the first night, then a few weeks to be sure. Sixty nights in total, handmade in our New Jersey workshop.
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