Pillow Cube
Pillow Cube Side Cube Deluxe 5" Pillow: Detailed Spec Analysis
The Pillow Cube Side Cube Deluxe is a purpose-built 5-inch memory foam pillow engineered specifically for side sleepers, with a distinctive cube shape that fills the gap between your neck and shoulder. Its solid memory foam construction with airflow channels and cervical support design makes it a standout choice for side sleepers dealing with neck and shoulder pain, though stomach sleepers and those who switch positions frequently may want to look elsewhere.
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Last updated: . Based on our analysis of 1,100+ pillows.
What Sets It Apart
Key specification highlights based on our analysis.
Memory Foam Fill
Fill type: memory foam
Cooling Technology
Airflow Channels cooling (642 out of 1134 pillows have cooling)
Machine Washable
Entire pillow is machine washable (613 out of 1134 pillows are fully washable)
Cervical Support
Ergonomic design for neck alignment (450 out of 1134 pillows offer this)
Considerations
Side Sleeper Specific
Optimized for side sleeping, may not suit other positions
Why We Recommend It
- 01.
Purpose-built cube shape fills the neck-shoulder gap that standard pillows miss, promoting proper spinal alignment for side sleepers
- 02.
Entire pillow is machine washable , only about 54% of pillows on the market offer this level of easy care
- 03.
Solid memory foam construction at 5.34 lbs provides consistent, reliable support without shifting or clumping over time
- 04.
Airflow channels built into the foam help regulate temperature better than standard solid memory foam
- 05.
Cervical support design targets neck and shoulder pain relief , a feature found in fewer than 40% of pillows we track
Considerations
- 01.
Optimized specifically for side sleeping , multi-position sleepers who shift to their back or stomach may find the cube shape awkward
- 02.
Customer feedback is mixed on firmness , some find it too firm despite the soft rating, which suggests a break-in period or personal preference factor
- 03.
At 28x14 inches, the compact footprint is smaller than a standard pillow, which may feel restrictive for restless sleepers
Technical Specifications
| Feature | Specification |
|---|---|
| Dimensions | 28" L x 14" W |
| Loft Height | 5" |
| Weight Per Pillow | 5.34 lbs |
| Fill Material | Memory foam |
| Fill Type | Solid |
| Adjustable Loft | No |
| Firmness Level | Soft |
| Adjustable Firmness | No |
| Cover Material | Microfiber |
| Washable Cover | Yes |
| Cooling Technology | Airflow channels |
| Side Sleeper | Yes |
| Back Sleeper | No |
| Stomach Sleeper | No |
| Cervical Support | Yes |
| Neck Alignment | Yes |
| Machine Washable | Yes |
Fill & Construction
The Side Cube Deluxe uses solid memory foam construction rather than shredded fill, which means you get a consistent loft and support profile that won't shift or flatten unevenly over time. The cube shape is the defining feature , it's engineered to match the width of your shoulder gap, keeping your neck and spine in a straight line.
At 5.34 lbs for a 28x14-inch pillow, the density indicates a quality foam that should hold up well with regular use.
Firmness & Support
Rated as soft firmness, though customer feedback suggests it leans firmer than expected , a common characteristic of solid memory foam versus shredded or fiber fills. The 5-inch loft is well-suited for average-to-broad-shouldered side sleepers who need enough height to bridge the neck-to-mattress gap without cranking the neck upward.
The cervical support design promotes proper neck alignment, and the consistent foam density means support doesn't degrade as you shift during the night.
Cooling & Breathability
Pillow Cube addresses the classic memory foam heat problem with airflow channels cut into the foam, allowing air to circulate through the pillow rather than just around it. The microfiber cover adds a soft, breathable outer layer.
While this is a meaningful improvement over standard solid memory foam, sleepers who run very hot should note that solid foam inherently retains more heat than shredded foam or natural fills.
Care & Durability
A standout feature is that the entire pillow is machine washable , not just the removable microfiber cover. This puts it in the top tier for ease of care and hygiene, since roughly half of pillows on the market only allow cover washing or spot cleaning.
The solid foam construction should maintain its shape and support longer than shredded or fiber alternatives, making regular washing less of a longevity concern.
Who Is This Pillow For?
Ideal For
- ✓ Dedicated side sleepers who wake up with neck or shoulder pain , the cube shape is specifically designed to fill the gap standard pillows leave
- ✓ Sleepers who want a low-maintenance pillow , the fully machine washable design means no fussing with cover-only washing
- ✓ People with neck alignment issues who need consistent cervical support , the solid memory foam holds its shape night after night
- ✓ Allergy-conscious sleepers who want to wash their pillow regularly to remove allergens and dust mites
Not Ideal For
- ✕ Combination sleepers who rotate between side, back, and stomach , the cube shape is optimized for one position and feels awkward in others
- ✕ Hot sleepers who need aggressive cooling , the airflow channels help but this is still solid memory foam, which retains more heat than shredded fills or down alternatives
- ✕ Sleepers who prefer a plush, sink-in feel , despite the soft firmness rating, solid memory foam has a firmer character than fiber or down fills
The Side Cube Deluxe typically arrives compressed and vacuum-sealed. After unboxing, allow 24-48 hours for the memory foam to fully expand to its 5-inch loft, though many users report it reaches usable shape within a few hours.
Let the pillow expand in a well-ventilated area to speed off-gassing , solid memory foam can have a noticeable new-foam smell for the first day or two
Give it 3-5 nights to break in before judging firmness , solid memory foam softens slightly with body heat and use
Pillow Cube offers warranty coverage on their products, but specific terms and duration should be verified directly on their website or product listing before purchase. Their customer service is generally responsive based on buyer feedback.
FAQ
Is the Pillow Cube Side Cube Deluxe good for neck and shoulder pain?
Yes, it's specifically designed for side sleepers who experience neck and shoulder pain. The cube shape fills the gap between your neck and the mattress, keeping your cervical spine aligned rather than bending it up or down.
Customers dealing with chronic neck issues report significant relief, though results vary based on shoulder width and mattress firmness.
Can I use this pillow if I sleep on my back too?
While the Pillow Cube is optimized for side sleepers, back sleepers can also benefit from the cervical support and neck alignment features. The 5-inch loft may feel slightly high for back sleeping on a soft mattress, but the contour design does support the natural curve of the spine in a back position.
How do you wash the Pillow Cube Side Cube Deluxe?
The entire pillow is machine washable , not just the cover. Use a gentle cycle with mild detergent and tumble dry on low heat.
This is a significant advantage over most memory foam pillows that only allow spot cleaning or cover-only washing.
Is the 5-inch Pillow Cube the right size for me?
The 5-inch loft works best for average-framed side sleepers. If you have broader shoulders or sleep on a firm mattress, you may need more height to fill the gap.
Narrower-shouldered sleepers or those on a softer mattress that lets the shoulder sink in may find the 5-inch version too tall. Pillow Cube offers different heights to match your build.
Does the Pillow Cube sleep hot?
The Deluxe version includes airflow channels in the foam to improve ventilation, which helps compared to standard solid memory foam. However, it's still a dense memory foam pillow, so it won't feel as cool as a shredded foam or down alternative pillow.
Most sleepers find the cooling adequate, but very hot sleepers may want to pair it with a cooling pillowcase.
How long does the Pillow Cube last before it loses its shape?
Solid memory foam pillows like the Side Cube Deluxe typically outlast shredded foam and fiber-fill pillows because they don't clump or flatten unevenly. At 5.34 lbs for its size, the density suggests a durable foam that should maintain its support for 2-3+ years with proper care.
The machine-washable design helps extend its usable life by keeping it clean without degrading the foam.
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Bottom Line
The Pillow Cube Side Cube Deluxe is one of the most intentionally designed side-sleeper pillows on the market. Its cube shape solves a real problem , filling the neck-to-shoulder gap that standard rectangular pillows handle poorly , and the combination of solid memory foam, cervical support, airflow channels, and full machine washability makes it a strong value.
If you're a committed side sleeper with neck or shoulder pain, this is worth trying, but combination sleepers and hot sleepers should weigh the trade-offs.
Best for dedicated side sleepers who need targeted neck and shoulder pain relief with easy-care convenience
Consider alternatives if you frequently switch sleep positions or need aggressive cooling beyond what airflow channels provide
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