Pillow Cube Side Cube Deluxe Review
Pillow Cube · Memory Foam · Firm · Research review — based on manufacturer specifications and our research
Published by Mr. Squish · Sources and verification · Report a correction
Editorial update: October 16, 2026
Research review
We have not slept on this pillow ourselves yet. Everything below is based on manufacturer specifications and our research — including published materials, dimensions, care instructions, trial and warranty terms — plus how it compares with pillows in the same category. We do not present any of it as first-hand experience.
- Fill
- AeroPluff memory foam
- Advertised loft
- 5 inches (Standard)
- Last fact checked
- September 2026
Product/catalog imagery is for identification, not proof of an in-house physical test.
The Side Cube Deluxe uses a block-shaped foam design intended for side sleeping. Its important trade-off is fixed geometry: the height and edge shape need to suit your own mattress and the way you change position.
Check the exact Deluxe listing when shopping. Side Cube Original, Deluxe and newer adjustable products should not be treated as one model with interchangeable dimensions or features.
Ready to give it a squish?
From $110 — check current pricing and selected options.
Compare the Deluxe if you prefer a block-shaped pillow and mainly stay on your side. Check the actual model, height and return policy; shoulder width alone cannot establish the correct fit.
What the evidence tells us
We do not assign numerical ratings to research reviews. Specifications alone cannot establish comfort, overnight cooling, pressure relief, or long-term durability. Compare the documented construction and fit below; any logged hands-on measurements appear in the testing record above.
- Construction
- AeroPluff memory foam
- Fit adjustment
- Fixed fill; compare the available heights and sizes before buying.
Specs at a glance
| Fill | AeroPluff memory foam |
|---|---|
| Cover | Soft knit outer shell |
| Advertised loft | 5 inches (Standard) |
| Firmness | Firm |
| Adjustable | No |
| Price | $110 |
| Height | 5 inches (Standard) |
| Features | Ventilation holes, antimicrobial treatment |
Why the shape matters
A squared block offers a different edge and surface from a conventional tapering bed pillow. That can be a reason to compare it for side sleeping, but it does not establish a universal height requirement or guarantee comfortable alignment.
Check the exact Deluxe model
Confirm the product name, size, listed height and current features before ordering. A specification published for the Original or Riser should not be transferred to the Deluxe. Manufacturer model names and listings can change.
Evaluate side and back positions
Try your normal position with the pillowcase and protector you will use. If you regularly roll onto your back, evaluate that position too. A block that fills a side-sleeping gap may feel too high when you turn.
What ventilation does not prove
Ventilation features describe the design. We have no completed Deluxe test establishing overnight cooling, pressure relief or a reduction in ear discomfort. Those outcomes should not be inferred from holes or a marketing description.
Compare a reversible adjustment method
If you are uncertain about height, compare a removable-fill pillow such as the Coop Original. That changes the adjustment mechanism; it does not mean one construction is universally better. Check return costs when testing a fixed-height product at home.
Pros and cons
Pros
- Distinct block shape for shoppers who prefer that geometry
- Fixed construction requires no loose-fill handling
- A specific alternative to a conventional pillow outline
Cons
- No loose-fill height tuning
- Fit can change when rolling onto the back
- Exact Deluxe specifications need model-specific confirmation
Ready to give it a squish?
Who should buy it
Adults who prefer a block shape and can verify that the selected Deluxe height suits their mattress and positions.
Who should skip it
Anyone needing incremental fill changes or a low profile when moving between side and back sleeping.
How this review was researched
We have not slept on this pillow. This review is based on manufacturer specifications and our research — published materials, dimensions, care instructions, trial and warranty terms, certifications — plus how those specs compare with pillows we know well in the same category. We do not present any of it as first-hand experience.
Comparable pillows
Pillow Cube Side Cube Deluxe comparisons
Final verdict
The Deluxe is a shape-specific option. Choose it only after checking the precise model, height and return conditions; compare adjustable fill if your preferred height is still uncertain.
Ready to give it a squish?
Frequently asked questions
Are Deluxe and Original the same model?
No. Check the exact listing rather than transferring a height, material or feature from a different Side Cube model.
Does a broad shoulder measurement prove it will fit?
No. Mattress compression, pillow compression and your positions also matter. Evaluate the actual setup rather than relying on one body measurement.
Has Mr. Squish measured the Deluxe’s cooling?
No completed overnight temperature comparison is recorded for this review.
Keep reading
Sources & verification
- Product specifications: Pillow Cube
- Manufacturer warranty: Pillow Cube refund and returns policy
Last fact checked: September 2026