Pillow Loft · Back Sleepers

The right pillow loft for a back sleeper, and how to set it

Written and reviewed by Jacob Katz and Kris Estigoy · Circadian, New Jersey

If you sleep on your back and keep waking up with a stiff neck, the problem is usually loft, not the pillow. This conversation covers the right pillow height for back sleepers, how to check yours in a mirror, and how an adjustable natural fill lets you set the loft your neck needs and keep it there.

Watch on YouTube. Full transcript below.

Why an adjustable loft is right for back sleepers

The best pillow loft for a back sleeper is a medium height that fills the space under your neck and keeps your head level, so your spine stays neutral and your chin does not tip toward your chest. The more useful answer is that the right loft is measured to your own frame, which is why every Circadian pillow ships overstuffed with a side zipper: you remove fill until your head sits level and set the height your neck needs instead of guessing off a size chart. Buckwheat gives firm, held support, the buckwool hybrid adds a softer top, and organic wool or organic cotton give a plusher, adjustable medium.

  • A back sleeper needs a medium loft that supports the neck's curve and keeps the head level; too tall drops the chin toward the chest, too flat lets the head tip back, and both strain the neck
  • Necks are not average, so a fixed medium is right for one frame and wrong for another; an adjustable fill lets you set the height to your own body and mattress
  • Buckwheat hulls flex to your neck and lock, holding firm cervical support all night where foam sinks; the buckwool hybrid gives that support with a soft wool side, and wool or cotton give a plusher medium
  • Every pillow ships about 30% overstuffed with a side zipper, so you remove fill to set your loft and add it back as the fill settles, keeping the height you set for years

What this video covers

How to set your pillow loft as a back sleeper

  1. Set height first, then fill. A back sleeper wants a medium loft that keeps the head level and the neck supported rather than just propped.
  2. Check it from the side in a mirror or a photo: forehead and chin about level, nose pointing at the ceiling, and the pillow meeting the curve of your neck.
  3. Choose an adjustable fill you can open, not a sealed fixed loft, so you set the height to your own frame and mattress.
  4. For firm, held support go buckwheat or the buckwool hybrid; for a plusher medium go organic wool or organic cotton; for a soft, down-like feel go kapok and fluff it to keep the loft.
  5. Remove fill through the side zipper until the strain is gone, and add a little back as it settles, so the loft you set on night one is the loft you keep.

Full transcript

The right pillow loft for a back sleeper

HostWhat is the right pillow loft for a back sleeper? Let's answer it two ways, the number most people want and the better answer underneath it.

ExpertThe short version is that a back sleeper wants a medium loft, enough to fill the space under the neck so the head rests level, without lifting the head so high the chin tips toward the chest. The more useful version is that the right loft is the one measured to your body, and that is something you get to set yourself instead of guessing off a size chart.

HostStart with why loft matters at all.

Why loft keeps your neck neutral

ExpertWhen you lie on your back there is a gap between the back of your head and the mattress, and your neck curves through that gap. A pillow's job is to fill it so the curve is supported and your spine stays in a neutral line from your head down through your back. Get that right and the muscles in your neck get to switch off for the night. Get it wrong and they hold tension for hours.

HostWhat does wrong look like?

Too high vs too low

ExpertTwo ways. Too much loft pushes your head up and forward, so your chin drops toward your chest and the back of your neck stretches all night. Too little lets your head tip backward, which shortens the muscles behind the neck and drops the jaw open. Both of those leave you stiff in the morning, and the tall version can crowd your airway, which is one reason a pillow that is too high can make snoring worse.

HostSo how does a back sleeper know they have it right?

How to check your own loft

ExpertLie down the way you normally sleep and check yourself from the side, in a mirror or with a photo. Your forehead and chin should sit about level and your nose should point at the ceiling, not tilted up or tucked down. The pillow should meet the curve of your neck, not just prop up the back of your skull. When it is right, it feels like the pillow is barely there.

HostHere is my problem. Every pillow on the shelf says medium. How do I know their medium is my medium?

Why a fixed-loft pillow misses

ExpertYou do not, and that is the real issue. A fixed-loft pillow is built to an average neck, and necks are not average. A broad-shouldered person on their back has a deeper gap to fill than a smaller-framed person, so the same pillow is right for one and wrong for the other. And it drifts over time, because a fixed pillow compresses, so the loft you bought is not the loft you have a year later.

HostThis is where your pillows do something different.

Set your own loft through the side zipper

ExpertEvery Circadian pillow ships overstuffed, with more fill than most people want, and you open the side zipper and take fill out until your head sits level. Instead of picking small, medium, or large off a menu, you tune the height to your own frame and your own mattress, a handful at a time, until the pillow disappears under your head.

HostAnd if I take out too much?

ExpertYou put some back. That is the whole idea. The fill lives in your hands, ready to add or remove. Most people find their loft in the first few nights and leave it, and they can nudge it again if they change mattresses or start sleeping a little differently.

HostLet's go fill by fill, because a back sleeper has choices. Buckwheat first.

Buckwheat: firm, held support

ExpertBuckwheat is the one I point most back sleepers to when they want firm, dialed-in support. It is filled with hulls, not fiber, and the hulls flex to the shape of your neck and then lock against each other and hold. That flex-then-lock is real cervical support that does not sink as the night goes on. You scoop hulls out to lower it or add them to raise it, and it stays right where you set it.

HostThat sounds firm.

ExpertIt is, and for a back sleeper that firmness is the feature, because that firmness keeps your head level and held instead of letting it sink in. Air moves freely between the hulls too, so it sleeps cool, which back sleepers feel because your face is pointed straight up all night.

HostWhat if I want firm support but a softer surface?

The buckwool hybrid: a softer top

ExpertThat is the Buckwool Hybrid. A firm buckwheat side gives you the support, a soft organic wool side gives you a gentler feel against your head, and it adjusts the same way. It is the pillow for a back sleeper who likes the idea of hull support but would rather not lie straight on a firm surface.

HostAnd the softer fills?

Wool and cotton: a plusher medium

ExpertOrganic wool and organic cotton both give you a cushioned, medium loft that you set by removing batting. Wool has a natural spring, so it holds its height and lifts back up each morning. Cotton is denser and holds a steady, even shape for years. Both are for the back sleeper who wants a plusher feel than hulls and still wants to dial the height in.

HostWhere does kapok fit?

Kapok: down-like, fluff to keep loft

ExpertKapok is the down-like one, the lightest natural fiber there is, and it gives you a soft, airy loft you can shape with your hands. It settles a little more than the others under your head, so you give it a fluff, and that daily shake keeps the loft where you want it. It is for the back sleeper who wants the feel of down without the down.

HostLet's put position in the picture, because I don't only sleep on my back.

Side, back, and stomach loft

ExpertLoft is really a conversation between your position and the gap you are filling. A side sleeper has the widest gap, from the mattress up to the ear across the whole shoulder, so side sleepers need the most height. A stomach sleeper wants the least, close to flat, so the head is not cranked up and back. A back sleeper lands in the middle. An adjustable pillow matters because you can set the loft for the position you spend the most time in.

HostSo a combination sleeper isn't stuck.

ExpertNot with a pillow you can open. You set it for your main position and it stays close enough for the others, and if you shift for good, you adjust it instead of buying a new pillow.

HostCome back to the part about loft changing over time.

Loft that lasts for years

ExpertA fixed pillow flattens, and you slide below the loft you need without noticing, until your neck starts to complain. With an adjustable natural fill you do the opposite. When it settles you add a little fill back or redistribute what is there, and the height you set on night one is the height you keep for years.

HostIf someone is waking up with a stiff neck right now, what is the first thing to check?

Stiff neck? Check loft first

ExpertLoft, before anything else. Most stiff-neck mornings for a back sleeper come from a pillow that is too tall or too flat, not from a bad pillow. The fix is usually a handful of fill in or out, and the reason to build a pillow you can open is that the fix takes about a minute, and you are the one who makes it.

HostThat is a good place to land.

The short version

ExpertA pillow you can adjust can be right for your neck tonight and still right a year from now. You set the loft, and you keep it there.

Explore the natural pillow collection at circadianrest.com. Every Circadian pillow has a GOTS certified organic cotton cover, license GOTS-10229 (Oregon Tilth); on the wool and cotton pillows the certification covers the whole pillow, and on the buckwheat, kapok, latex, and buckwool pillows it covers the cover. Every pillow ships about 30% overstuffed with a side zipper, so you set your own loft and keep it. Handmade in New Jersey since 1981.