# Sleep Align

> Independent pillow research covering sleep ergonomics, pillow loft and neck pain. Not a clinical practice and not staffed by clinicians.

All datasets, charts and tools listed here are free to reproduce, redraw, embed or quote under CC BY 4.0 with a link back to the source page. No permission needed.

Method: specifications come from manufacturers' own published pages, with the source URL recorded per row. This site does not buy, test, weigh or sleep on the products it writes about and never claims to. Where a figure is not published, it is recorded as missing rather than estimated.

## Datasets

- [Pillow Loft & Specification Database](https://sleepalign.org/pillow-specification-database/): Published loft, fill, firmness, adjustability, cooling claim, trial window, warranty and price for 32 pillows sold in the US, each row sourced to a manufacturer page. Of these, 16 publish a loft measurement and the rest publish none.
  - CSV: https://sleepalign.org/data/pillow-specifications.csv
  - JSON: https://sleepalign.org/data/pillow-specifications.json

## Tools

- [Pillow Height Calculator](https://sleepalign.org/pillow-height-calculator/): Computes the supported pillow loft a body needs from sleeping position, frame width and mattress firmness.
  - API: https://sleepalign.org/wp-json/sleepalign/v1/loft?position=side&build=average&firmness=medium
  - OpenAPI: https://sleepalign.org/data/openapi.json
- [Sleep Quiz](https://sleepalign.org/sleep-quiz/): Routes a sleeper to the loft range and guide that match their position, build and mattress.

## Reference

- [Sleep Reference](https://sleepalign.org/sleep-reference/): Hub for the citable reference assets: datasets, charts and models, all CC BY 4.0.
- [Sleep Position & Pain Map](https://sleepalign.org/sleep-position-pain-map/): Side, back, stomach and combination sleeping mapped to the pillow loft each needs on soft, medium and firm mattresses, with the mechanical reason and a source per claim.

## Condition guides

- [Best Pillow for Recliner Sleeping](https://sleepalign.org/best-pillow-for-recliner-sleeping/): Neck support when the sleeping surface is a reclined chair rather than a flat mattress.
- [Best Pillow for Cervical Stenosis](https://sleepalign.org/best-pillow-for-cervical-stenosis/): Loft and position for narrowing of the cervical canal, side sleepers in particular.
- [Best Pillow for Pinched Nerve in Neck](https://sleepalign.org/best-pillow-for-pinched-nerve-in-neck/): Cervical radiculopathy: what changes the traction on the nerve root overnight.
- [Best Pillow for Cervical Spondylosis](https://sleepalign.org/best-pillow-for-cervical-spondylosis/)
- [Best Pillow for Military Neck](https://sleepalign.org/best-pillow-for-military-neck/): Loss of cervical lordosis and why a high pillow makes it worse.
- [Best Pillow for Degenerative Disc Disease in the Neck](https://sleepalign.org/best-pillow-for-degenerative-disc-disease-neck/)
- [Best Pillow for Occipital Neuralgia](https://sleepalign.org/best-pillow-for-occipital-neuralgia/)
- [Best Pillow for Frozen Shoulder](https://sleepalign.org/best-pillow-for-frozen-shoulder/)
- [Best Pillow After Cervical Fusion (ACDF)](https://sleepalign.org/best-pillow-after-cervical-fusion/)
- [Best Pillow for Shoulder Pain](https://sleepalign.org/best-pillow-for-shoulder-pain/)

## Pillow fundamentals

- [How to Choose a Pillow for Your Sleep Position](https://sleepalign.org/how-to-choose-a-pillow-for-your-sleep-position/)
- [Pillow Firmness Guide](https://sleepalign.org/pillow-firmness-guide/)
- [Memory Foam vs Latex Pillow for Neck Pain](https://sleepalign.org/memory-foam-vs-latex-pillow-for-neck-pain/)
- [Buckwheat vs Memory Foam Pillow](https://sleepalign.org/buckwheat-vs-memory-foam-pillow/)
- [How Often Should You Replace Your Pillow](https://sleepalign.org/how-often-should-you-replace-your-pillow/)
- [How Long Does a New Pillow Take to Stop Hurting Your Neck](https://sleepalign.org/how-long-new-pillow-stop-hurting-neck/): The adaptation window, and how to tell adaptation apart from a pillow that is simply the wrong height.

## Key facts

- Supported pillow loft = ear-to-mattress gap minus shoulder sink. A softer mattress needs a LOWER pillow, not a higher one, because the shoulder sinks further into it.
- Side sleeping computes to roughly 3.5-6.25 in and back sleeping to roughly 2.75-4.4 in, before a +/- 0.5 in tolerance band.
- Stomach sleeping is treated as a fixed 1-2 in; no loft makes the position good for the neck.
- Loft figures are not comparable across fill types: down and down-alternative heights are published uncompressed and collapse under load, while moulded foam and latex barely compress.

## Full text

- https://sleepalign.org/llms-full.txt

## Contact

- hello@sleepalign.org for corrections, raw figures behind any table, or the calculator as an embed.


---

# Full dataset: pillow specifications (version 2026-08-15)

Source: https://sleepalign.org/pillow-specification-database/ | Licence: CC BY 4.0
"not published" means the manufacturer states no figure. Nothing below is estimated.

## Avocado Green Pillow
- Fill: Shredded organic latex + kapok
- Published loft: not published
- Adjustable loft: yes
- Firmness: Medium-plush
- Cooling claim: yes
- Trial / returns: 100 nights
- Warranty: 1 yr
- Price: $135 (queen)
- Stated sleeping position: All positions
- Source: https://www.avocadogreenmattress.com/products/green-pillow/

## Bear Cloud Pillow
- Fill: Down alternative (polyester)
- Published loft: not published
- Adjustable loft: no
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 30 nights
- Warranty: not published
- Price: not published
- Stated sleeping position: All positions
- Source: https://www.bearmattress.com/products/cloud-pillows

## Beckham Hotel Collection Original Down Alternative
- Fill: Down alternative (1,050 g)
- Published loft: 8.0" overfilled
- Adjustable loft: no
- Firmness: Plush / medium-firm
- Cooling claim: no
- Trial / returns: 30 nights
- Warranty: not published
- Price: $68.99 (std/queen, set of 2)
- Stated sleeping position: All positions
- Source: https://beckhamhotelcollection.com/products/original-down-alternative-pillow-set

## Casper Original
- Fill: Down alternative (polyester microfibre)
- Published loft: 9.0" uncompressed
- Adjustable loft: no
- Firmness: Medium-soft
- Cooling claim: no
- Trial / returns: 30 days
- Warranty: 1 yr
- Price: $75 (queen)
- Stated sleeping position: All positions
- Source: https://casper.com/products/pillows

## Chiroflow Premium Water Pillow
- Fill: Ventilated memory foam over water base
- Published loft: not published
- Adjustable loft: yes
- Firmness: Set by water volume
- Cooling claim: yes
- Trial / returns: 30 days
- Warranty: 3 yr
- Price: $99.95 (stated patient price)
- Stated sleeping position: not published
- Source: https://www.chiroflow.com/

## Coop Sleep Goods Cool+ Adjustable
- Fill: Gel-infused shredded memory foam + microfiber
- Published loft: not published
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 100 nights
- Warranty: 5 yr
- Price: $149 (queen)
- Stated sleeping position: not published
- Source: https://coopsleepgoods.com/products/the-eden-cool

## Coop Sleep Goods Original Adjustable
- Fill: Shredded memory foam + microfiber
- Published loft: not published
- Adjustable loft: yes
- Firmness: Medium-firm
- Cooling claim: no
- Trial / returns: 100 nights
- Warranty: 5 yr
- Price: $89 (queen)
- Stated sleeping position: All positions
- Source: https://coopsleepgoods.com/products/the-original-pillow

## Core Products Tri-Core Cervical
- Fill: Polyester fibre, trapezoid contour
- Published loft: 4.0-5.0" overall (lobe heights not published)
- Adjustable loft: no
- Firmness: Firm / Gentle
- Cooling claim: no
- Trial / returns: 90 days
- Warranty: not published
- Price: $51.99 (full size)
- Stated sleeping position: Back, side
- Source: https://www.coreproducts.com/products/tri-core-pillow

## Derila Ergo Neck Support
- Fill: Contoured memory foam (CertiPUR-US)
- Published loft: 4.7"
- Adjustable loft: no
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 60 nights
- Warranty: not published
- Price: $133.30 list; frequently shown at $59.99 promo (one size)
- Stated sleeping position: Back, stomach
- Source: https://derilashop.com/products/neck-support-pillow

## EPABO Contour Memory Foam
- Fill: Contoured memory foam
- Published loft: not published
- Adjustable loft: no
- Firmness: Firm / Soft
- Cooling claim: yes
- Trial / returns: not published
- Warranty: not published
- Price: not published (routes to Amazon)
- Stated sleeping position: All positions
- Source: https://myepabo.com/

## Elviros Cervical Memory Foam
- Fill: Contoured memory foam
- Published loft: 3.54-5.5" (by size, dual-height contour)
- Adjustable loft: no
- Firmness: Firm / Soft
- Cooling claim: yes
- Trial / returns: 100 nights
- Warranty: not published
- Price: $49 sale / $98 list (queen)
- Stated sleeping position: Back, side
- Source: https://www.elviros.com/products/elviros-cervical-memory-foam-pillow-for-sleeping-fluttershape-pillows-upgrade

## Helix ComfortAdjust Cooling
- Fill: Shredded memory foam + fibre
- Published loft: not published
- Adjustable loft: yes
- Firmness: 3 settings via zips
- Cooling claim: yes
- Trial / returns: 30 days (site states 100 at checkout - conflicting)
- Warranty: 1 yr
- Price: $158.75 (standard; no queen)
- Stated sleeping position: All positions
- Source: https://helixsleep.com/products/comfortadjust-cooling-pillow

## Layla Kapok Pillow
- Fill: Shredded memory foam + kapok
- Published loft: not published
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 30 nights
- Warranty: 5 yr
- Price: $114 (std/queen)
- Stated sleeping position: not published
- Source: https://laylasleep.com/product/kapok-pillow/

## Leesa Ultra Cool Reversible
- Fill: Solid memory foam + gel grid
- Published loft: 4.0" / 5.0" (reversible)
- Adjustable loft: no
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 30 nights
- Warranty: 1 yr
- Price: $149 (queen)
- Stated sleeping position: High side: side / Low side: back-stomach
- Source: https://www.leesa.com/products/ultra-cool-reversible-pillow

## MARNUR Cervical Contour
- Fill: High-density contoured memory foam
- Published loft: 4.5" / 5.5" (two shapes)
- Adjustable loft: no
- Firmness: not published
- Cooling claim: no
- Trial / returns: not published
- Warranty: not published
- Price: $39.99
- Stated sleeping position: All positions
- Source: https://www.marnur.net/products/marnur-cervical-pillow-memory-foam-orthopedic-pillow-for-neck-pain-sleeping-side-back-stomach-sleeper-with-washable-pillowcase

## Marlow (Brooklinen) Marlow Pillow
- Fill: Gel-infused shredded memory foam + fibre
- Published loft: not published
- Adjustable loft: yes
- Firmness: 3 settings via zips
- Cooling claim: yes
- Trial / returns: 365 days
- Warranty: 2 yr
- Price: $49 (standard; no queen)
- Stated sleeping position: Zipped: side / One open: back / Open: stomach
- Source: https://marlowpillow.com/products/the-pillow

## Mediflow Original Water Pillow
- Fill: Fibre over adjustable water base
- Published loft: not published
- Adjustable loft: yes
- Firmness: Set by water volume (2-5 L)
- Cooling claim: no
- Trial / returns: 30 nights
- Warranty: 3 yr
- Price: $74
- Stated sleeping position: All positions
- Source: https://www.mediflow.com/products/original-fiberfill-pillow

## Nectar Serenity Cooling
- Fill: Shredded memory foam + polyester
- Published loft: 6.0"
- Adjustable loft: no
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 30 nights
- Warranty: 1 yr
- Price: $75 (standard; no queen)
- Stated sleeping position: not published
- Source: https://www.nectarsleep.com/bedding/serenity-cooling-pillow

## Parachute Down Pillow
- Fill: 85% European white down clusters
- Published loft: not published
- Adjustable loft: no
- Firmness: Soft / Medium / Firm
- Cooling claim: no
- Trial / returns: 60 days
- Warranty: 3 yr
- Price: $160 (standard; no queen)
- Stated sleeping position: not published
- Source: https://www.parachutehome.com/products/down-pillow

## Pillow Cube Side Cube Riser
- Fill: Block AeroFoam with removable risers
- Published loft: 3.0 / 4.0 / 5.0" (removable risers)
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 60 nights
- Warranty: not published
- Price: $78.99 list (one size)
- Stated sleeping position: Side
- Source: https://www.pillowcube.com/products/side-cube-riser

## Purple Freeform
- Fill: MicroFlex foam + gel grid
- Published loft: 7.5"
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 30 nights
- Warranty: 1 yr
- Price: $229-$269 (no queen size)
- Stated sleeping position: not published
- Source: https://purple.com/pillows/free-form

## Purple Harmony
- Fill: Talalay latex core + gel grid
- Published loft: 5.5 / 6.5 / 7.5" (by loft choice)
- Adjustable loft: no
- Firmness: Medium
- Cooling claim: yes
- Trial / returns: 30 nights
- Warranty: 1 yr
- Price: $229-$269 (no queen size)
- Stated sleeping position: Low: stomach-back / Med+Tall: side
- Source: https://purple.com/pillows/harmony

## Saatva Latex Pillow
- Fill: Shredded latex core + microdenier fibre
- Published loft: 4-5" std / 6-7" high
- Adjustable loft: no
- Firmness: not published
- Cooling claim: no
- Trial / returns: 45 days
- Warranty: 1 yr
- Price: $165 (queen)
- Stated sleeping position: Std: back-stomach / High: side
- Source: https://www.saatva.com/bedding/the-saatva-pillow

## Sleep Number True Temp
- Fill: Conforming foam + fibrefill
- Published loft: not published
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: yes
- Trial / returns: not published
- Warranty: not published
- Price: $109.99 list
- Stated sleeping position: Classic: stomach-back / Contour: side-back / Ultimate: all
- Source: https://www.sleepnumber.com/products/true-temp-pillow

## Snuggle-Pedic Ultra-Luxury Bamboo Shredded
- Fill: Shredded memory foam blend
- Published loft: not published
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: yes
- Trial / returns: not published
- Warranty: not published
- Price: not published (routes to Amazon)
- Stated sleeping position: Side, stomach, back
- Source: https://snugglepedicinc.com/products/

## Sutera Dream Deep
- Fill: Contoured memory foam
- Published loft: not published
- Adjustable loft: no
- Firmness: Medium-firm
- Cooling claim: yes
- Trial / returns: 30 nights (site also badges 90 - conflicting)
- Warranty: not published
- Price: $72.79 (one size)
- Stated sleeping position: Side; all positions
- Source: https://sleepsutera.com/products/dream-deep

## Tempur-Pedic TEMPUR-Cloud
- Fill: Solid memory foam
- Published loft: 5.0"
- Adjustable loft: no
- Firmness: Extra-soft
- Cooling claim: no
- Trial / returns: none - pillows excluded from returns
- Warranty: 5 yr
- Price: $79 (queen)
- Stated sleeping position: Back, stomach
- Source: https://www.tempurpedic.com/shop-pillows/tempur-cloud-essential-pillow/

## Tempur-Pedic TEMPUR-Neck
- Fill: Solid contoured memory foam
- Published loft: 3.5-4.75" (by size)
- Adjustable loft: no
- Firmness: Firm
- Cooling claim: no
- Trial / returns: none - pillows excluded from returns
- Warranty: 5 yr
- Price: $109
- Stated sleeping position: Side, back
- Source: https://www.tempurpedic.com/shop-pillows/tempur-neck-pillow/

## The Company Store Legends Hotel Down
- Fill: 600 fill-power European down
- Published loft: not published
- Adjustable loft: no
- Firmness: Soft / Med / Firm / X-Firm
- Cooling claim: no
- Trial / returns: 30 days
- Warranty: Lifetime guarantee
- Price: $191.20 (standard)
- Stated sleeping position: not published
- Source: https://www.thecompanystore.com/best-rds-certified-european-down-soft-pillow/PP33.html

## Therapeutica Sleeping Pillow
- Fill: Moulded orthopaedic foam
- Published loft: 4.75 / 5.25 / 6.25" (by size)
- Adjustable loft: no
- Firmness: Firm / Lite
- Cooling claim: yes
- Trial / returns: 90 days
- Warranty: 5 yr
- Price: $109.59 (average size)
- Stated sleeping position: Side, back
- Source: https://www.coreproducts.com/products/therapeutica-sleeping-pillow-ergonomic

## Tuft & Needle Original Foam
- Fill: Solid adaptive foam (graphite + gel)
- Published loft: 5.0"
- Adjustable loft: no
- Firmness: not published
- Cooling claim: yes
- Trial / returns: 100 nights
- Warranty: 3 yr
- Price: $100 (standard; no queen)
- Stated sleeping position: All positions
- Source: https://www.tuftandneedle.com/products/foam-pillow

## Xtreme Comforts Shredded Memory Foam
- Fill: Shredded memory foam
- Published loft: not published
- Adjustable loft: yes
- Firmness: not published
- Cooling claim: no
- Trial / returns: not published (fulfilled by Amazon)
- Warranty: Lifetime vs defects
- Price: $33.99-$109.98 range only
- Stated sleeping position: Side, back, combination
- Source: https://www.xtremecomforts.com/products/shredded-pillow/