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(4.5) 2 reviews

Side Cube Riser

$78.99 USD
  • Patent-Pending Modular Design
  • Customize Your Pillow Height
  • Perfect for Most Side Sleepers
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The Side Cube Riser is a patent-pending modular pillow engineered for side sleepers who need a personalized fit — not a one-size-guess. Built on the same cube shape that fills the 90-degree gap between shoulder and head, it ships fully stacked at 5" — the height that works for most people right out of the box. If you need less, simply remove one or both included risers to step down to 4" or 3". One pillow, your perfect height.

  • Patent-pending modular design: Ships fully stacked at 5" — the right height for most side sleepers. Includes two removable 1" risers so you can step down to 4" or 3" if needed.
  • Purpose-built cube shape: Fills the shoulder gap and cradles the head to support neutral neck and spine alignment, reducing pressure on the neck and shoulders.
  • Premium AeroFoam core: Breathable viscoelastic polyurethane foam that allows consistent support while resisting heat buildup.
  • Soft, breathable cover: Ventilated outer shell pulls heat away from the face and neck; removable and machine washable for easy care.
  • Dimensions & weight: 12" W × 24" L × 5" H (fully stacked); approximately 2.5 lbs.
  • HSA/FSA eligible: Select Flex | Pay with HSA/FSA at checkout and follow the brief eligibility steps during payment.

The Side Cube Riser ships fully stacked at 5" — the height that fits most side sleepers right out of the box. If it feels too tall, simply remove one or both risers to drop down to 4" or 3".

The Side Cube Riser is backed by a 60-night exchange/refund window so you have time to find your perfect height.

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MADE FOR SIDE SLEEPERS, BY SIDE SLEEPERS

Old fashioned pillows are made with cheap foam dumped into a sack. But sleepers need more support, and we will try anything to get it; folding, stacking, nothing works.

Pillow Cube fills the gap between your bed and your head, aligns your spine, and supports your noggin.

GET THE SIDE CUBE

What if I sleep on my back and side?

Not a problem. Meet our latest addition to the family, the Combo Cube.

Designed for our noncommittal sleepy heads, the Combo Cube is the ultimate pillow for back & side sleepers.

We took our premium cut AeroFoam and sculpted a head-sized valley to cradle your noggin and keep your neck aligned, no matter how you sleep. Then we leveled it up by adding modular risers, giving you the ability to customize the height of your pillow to match your body, mattress, and sleep style. 

Get the Combo Cube
4.5
Rated 4.5 out of 5 stars
Based on 2 reviews
Total 5 star reviews: 1 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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2 reviews
  • Karina S.
    Verified Buyer
    How old are you? 25-34
    What Position do you Sleep In? Side, Back
    Bought For Sleep help
    5 days ago
    How old are you? 25-34
    What Position do you Sleep In? Side, Back
    Bought For Sleep help
    Rated 5 out of 5 stars
    I LOOOOVE IT!!!

    I’ve loved pillow cubes for 3 years now. I have all of them except for the pillow cube combo and the travel pillow. When they got rid of the 4 inch side pillow cube, i was sad because my husband took my 4 inch one for himself and i wanted to order one again for me. So once I saw this one on presale, I ordered it! I think the riser idea is genius! I’ve been sleeping happily for the last 3 years and now, that I’m pregnant, I have been using all the pillow cubes I own in different ways wether it’s to sleep comfortably on my bed or while napping on the couch, support for my back when sitting on couch, or help with aligning my hips. No matter what, I’m still getting very comfortable sleep. Personally I can sleep very comfortably on my back too with these side pillow cubes. I just can’t right now because I’m pregnant and it’s not good for the baby but you bet I’ll be ordering the combo pillow once i give birth to add to my collection! I hope everyone loves this pillow as much as I do!

    The lighter gray pillow is this new pillow cube riser with pillow case on minus a 1 inch riser making it a 4 inch one for me and I put the riser on top of my regular 5 inch pillow cube making it a 6 inch one.

    Was this helpful?
    PC Profile picture for Pillow Cube
    Pillow Cube
    3 hours ago

    This absolutely made our day 😭💙

    First off — congratulations on your growing family! We’re so happy to hear your Pillow Cubes have been helping you stay comfortable throughout your pregnancy and beyond. The way you’ve customized the Side Cube Riser setup is honestly genius, and it’s exactly why we were so excited about the adjustable riser concept in the first place.

    Hearing that you’ve been a Pillow Cube fan for three years, own almost the whole collection, and are finding new ways to use them for sleep, support, alignment, and lounging means the world to us. And we love that the removable riser helped recreate your beloved 4" Side Cube setup! 😄

    Thank you so much for such an enthusiastic and thoughtful review. We’re wishing you lots of restful sleep, cozy naps, and all the comfort possible during this exciting season of life. 💙

  • Mary
    3 weeks ago
    Rated 4 out of 5 stars
    4 Stars

    I wish the “slices” of pillow were a bit thinner, i fond myself putting it on, taking it off over and over

    Was this helpful?
    PC Profile picture for Pillow Cube
    Pillow Cube
    1 week ago

    Thanks for sharing that — and we totally understand how that can get a bit frustrating when you’re trying to dial in the perfect height.

    The Side Cube Riser is designed to offer a small, adjustable lift so you can fine-tune your neck alignment based on your sleep position and mattress setup. We appreciate your feedback about the 1" riser feeling a bit too much at times — that kind of input is really helpful as we continue refining comfort options and adjustability.

    Thanks again for taking the time to let us know how it’s working for you!

FAQ

What is a pre-order?

A pre-order is an order placed for a product that has not yet been launched. It ensures you secure the product before it becomes available to the general public.

When will you ship my Side Cube Riser?

Estimated shipping time frame for pre-ordered Side Cube Risers: 03/20/2026

What are the dimensions of the pillow?

12" W × 24" D × 5" H (fully stacked); approximately 2.5 lbs.

Where do you ship to?

We currently ship within the United States.

What is the pillow made of?

Our high-quality foam is made of breathable, viscoelastic polyurethane.

Can I cancel my pre-order?

Yes, you may request an exchange or a refund within 60 nights of the shipping date. 

  • Returns and exchanges are only available within the 48 contiguous United States of America.
  • Your refund will be processed, minus any shipping costs that you paid at the time of your purchase.
  • There is a $15 return shipping fee, unless Re:do was purchased at checkout, you will receive free shipping