Pillow Cube Review: The Best Pillow For Side Sleepers?

By Naima Karp
📅 February 6, 2024

In a Rush? Get the Fast Facts

  • A cube-shaped pillow with a medium-firm feel designed for side sleepers

  • A high-density memory foam option that conforms to your body

  • Aligns your spine, improves circulation, and reduces pain

  • Available in a smaller version

  • An alternative to latex/down pillows

  • A possible solution to snoring and poor sleep quality

  • Over 2,000 positive reviews

If you’re a side sleeper like me, you’ll probably agree that the mission to find the perfect pillow can feel impossible. As hard as it is to admit, you might need to throw out your old, flattened-out pillow and replace it with a new one that actually supports your sleeping position. The Pillow Cube conforms to your body and squares your shoulder off, providing the support you need. In this detailed Pillow Cube review, I’ll explore why this side sleeper pillow is supposedly a step above the rest and see if it’s worth all the hype it’s been getting online.

According to studies, loft (or the height of your pillow) plays a major role in determining the angle of your head in relation to your spine. In other words, if a pillow is too low or too high, you get a kink in your neck or deal with shoulder pain all day. This is because many pillows collapse or slide upwards and away from the neck, which can cause pain in the upper back, collarbone, and shoulder. Compared to stomach and back sleepers, side sleepers require a thicker pillow with a medium loft, which is where this memory foam pillow shines. Memory foam gently conforms to the body, making it a better option than down or feather pillows, which can lose density and loft over time. 

With pillow shape being the primary factor leading to symptoms like shoulder pain and decreased sleep quality, the Pillow Cube is the self-care investment that 2023 desperately needs. It might not look like your average pillow, but based on reviews, this supportive sleep product might make a world of difference.

Pillow Cube Side Cube Pillow
Pillow Cube


What Is A Pillow Cube?

Despite looking like a yoga block, this high-density memory foam known as the Pillow Cube is made from a single block of foam and is a popular pillow for side sleepers. The more pressure is applied to it, the denser it feels. Due to its cube-like shape, it fills the 90-degree shoulder gap in a way that most regular pillows don’t. They also have a smaller version for travel, dubbed the Sidekick, which is about half the price.

How Much Is A Pillow Cube?

The regular Pillow Cube is normally $150 and is currently on sale for $110. For an extra $25, you upgrade to a Side Sleeper Ice Cube Pillow, which keeps the pillow cool all night long.  You can also add a White Microfiber Perfect Fit Pillowcase for $15.

Where to Buy Pillow Cube

The Pillow Cube can be bought on their website, where you can keep an eye out for sales and other deals. It’s also available for sale from retailers like Amazon, Target, Walmart and Bed, Bath & Beyond. 

Shop The Cube Collection Now
Pillow Cube

How Firm Is The Pillow Cube?

Many of you are probably wondering just what this product feels like beyond fitting that “shoulder gap.” One shopper called it “firm but soft,” while the company describes it as medium-firm, meaning the pillow isn’t too plush but still cradles pressure points to provide relief. Although it might not look the most supportive at first glance, just read a Pillow Cube review or two, and you’ll feel a bit more confident. The foam has a slow-moving feel, but there is still a sinking sensation for comfort.

Does The Pillow Cube Come With Its Own Cover?

Yes, the Pillow Cube has a microfiber cover that resembles a sports jersey. Made from spandex and polyester, it’s slightly soft and slippery. Using a pillow case with it is still recommended, and the website sells an entire line of pillowcases specifically for this uniquely shaped pillow. 

Is The Pillow Cube Suitable For Hot Sleepers?

Some of you might be raising an eyebrow at the fact that this pillow is made from solid memory foam (which typically runs hot), but no matter what Pillow Cube review you look at, the majority of customers don’t have anything to say about the temperature of the pillow. Those who do bring it up mention that it stays cool and doesn’t retain much heat, making this an ideal option for hot and cold sleepers alike. 

See Spring Sale Deals
Pillow Cube

Is The Pillow Cube Adjustable?

Since it’s made from a single piece of foam, it’s unfortunately not adjustable. This means that it’s truly a side sleeper pillow and may not be the best choice for combination sleepers, back sleepers, or stomach sleepers. That being said, it is available in different lofts. The standard pillow has a 5-inch loft, while the thinner version stands 4 inches and is advertised for petite people under 5 foot 3 inches tall. There’s also a thicker 6-inch pillow for anyone above 6 foot 3 inches. Combination sleepers should opt for the lowest loft possible.

Pros and Cons: 


  1. Designed for Side Sleepers: The Pillow Cube is specifically designed for side sleepers, filling the 90-degree shoulder gap and providing support for the spine, which is crucial for side sleepers.
  2. High-Density Memory Foam: The pillow’s high-density memory foam conforms to the body, offering a medium-firm feel. This feature is advantageous for side sleepers, as it cradles pressure points, aligns the spine, and potentially reduces pain.
  3. Temperature Regulation: Despite being made from solid memory foam, the Pillow Cube is reported to stay cool and not retain much heat. This makes it suitable for both hot and cold sleepers, enhancing overall comfort during sleep.



  1. Non-Adjustable: Since the Pillow Cube is made from a single piece of foam, it is not adjustable. This limits its suitability to side sleepers and may not be the best choice for combination sleepers, back sleepers, or stomach sleepers.
  2. Limited Loft Options: While the Pillow Cube offers different lofts to accommodate various body sizes, it may not cater to all preferences. The standard 5-inch loft, a 4-inch option for petite individuals, and a 6-inch version for taller individuals might not cover the full spectrum of user preferences.
  3. Potentially Expensive: The regular price of $150 and the current sale price of $110 may be considered relatively expensive for a pillow. However, some reviewers argue that the durability and the positive impact on sleep quality may justify the price, but it remains a subjective consideration.

What Are The Pillow Cube Reviews Saying?

Reviewers report sleeping more deeply and waking up with less neck pain, which is the goal of a well-designed side sleeper pillow. One Pillow Cube review calls the cushion “a blessing” and while another does call the price tag slightly expensive, they note that it lasts significantly longer than your average pillow. Even if you end up not liking it based on personal preferences, the generous 60-day return policy gives you plenty of time to try it out.

Referenced Scientific Studies

Lei JX, Yang PF, Yang AL, Gong YF, Shang P, Yuan XC. Ergonomic Consideration in Pillow Height Determinants and Evaluation. Healthcare (Basel). 2021, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8544534/

Son, J.; Jung, S.; Song, H.; Kim, J.; Bang, S.; Bahn, S. A Survey of Koreans on Sleep Habits and Sleeping Symptoms Relating to Pillow Comfort and Support. Int. J. Environ. Res. Public Health (2020) 17, 302. https://doi.org/10.3390/ijerph17010302

Interested? Shop Pillow Cube Here

Thanks for reading! We strive to provide you with honest feedback about the products we use and love. So you’re aware, we may collect a commission from the affiliate links on this page, which help us keep Finders & Keep up and running. Product prices are correct at the time of publication but may be subject to change.

Subscribe to our newsletter for editor picks and exclusive deals

Check It Out

Finders & Keep has an advertising relationship with some of the brands discussed on this site and we may receive a referral fee when someone clicks on one of our affiliate partner links. 

The opinions expressed on Finders & Keep are entirely our own. The content was chosen by our editorial team. Any product claim or representation about a product or service should be verified with the manufacturer or provider.