Sleep Sage editorial team · pillow reviews based on published specifications, materials, policies and editorial research
Most PopularPillow Cube
Pillow Cube Side Cube Pro
Cube-shaped pillow that fills the shoulder gap perfectly for side sleepers
Fill
Premium memory foam
Firmness
Medium-Firm
Trial Period
60 nights
Warranty
3 years
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Editorial Ratings
These are editorial research ratings, not Sleep Sage lab measurements. This pillow has not completed our physical testing protocol.
Pillow Cube Side Cube Pro Overview
The Pillow Cube Side Cube Pro holds constant loft across its surface so a side sleeper's head does not sink into a lower spot overnight. It is excellent for dedicated side sleepers and wrong for combination sleepers.
Our Review
The Pillow Cube Pro takes a radically different approach — instead of a shoulder cutout, it uses a tall cube shape that perfectly fills the gap between your shoulder and head when side sleeping. Available in three heights to match your shoulder width. Over 4,000 reviews and viral social media popularity make it the most-talked-about side sleeper pillow.
What We Love
- Unique cube shape fills shoulder-to-head gap perfectly
- Three height options for different body types
- Premium memory foam construction
- 60-night trial period
- Viral popularity with 4,000+ reviews
Room for Improvement
- Unusual shape takes getting used to
- Not suitable for back or stomach sleeping
- Memory foam can sleep warm
- Smaller surface area than traditional pillows
Who This Pillow May Suit
How We Researched the Pillow Cube Side Cube Pro
This is a research evaluation. We have not put the Pillow Cube Side Cube Pro through our physical lab protocol, so this page describes verified construction, manufacturer specifications, policies, comparative analysis and published owner feedback.
Research Evaluation: This pillow has not completed our physical lab testing protocol, and we publish no Sleep Sage lab measurements for it. Our evaluation is based on verified construction, manufacturer specifications, policies, comparative analysis and available owner feedback.
Construction & Materials Review
We document the pillow's published layer construction, materials, densities and cover fabrics from manufacturer specifications and supporting documentation.
Specification & Certification Verification
We check published specifications, certifications and material claims against the manufacturer's own documentation, and flag anything we cannot confirm.
Policy & Price Verification
Trial length, return terms, warranty coverage, shipping and current pricing are recorded from the retailer and re-checked when we update the review.
Owner Feedback Synthesis
We summarise recurring themes in published owner feedback rather than republishing individual reviews, names or vote counts.
Comparative Analysis
We position the pillow against comparable models we have measured, using construction similarities — never by assigning it measurements it does not have.
What We Have Not Done
No documented pressure mapping, thermal logging, motion-transfer, edge-deflection or durability measurements are available for this unit. We publish no lab scores until they are.
Editorial transparency: Ben Trapskin owns Yawnder, a mattress retailer, and Sleep Sage may earn commissions from qualifying purchases. Retail and affiliate relationships do not substitute for independent measurement evidence. We identify which observations are firsthand and which claims come from manufacturer sources. Read our full editorial policy and detailed testing methodology.
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Read discussionWhere the Pillow Cube Side Cube Pro Ranks
See how this pillow compares with other products in the same category using our current editorial criteria.
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