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Best Knee Pillows (2021 Picks)

Sleeping with a pillow between your knees supports optimal spine alignment. Particularly if you’re a side sleeper, this simple adjustment can help relieve joint and back pain. Knee pillows are simply orthopedic pillows designed specifically for this purpose – they are shaped to match the natural contours of your body and made from supportive materials like memory foam.

While it may seem like one knee pillow is like any other, there are some important features to consider. We’ve done the research and testing to bring you our top picks for the best knee pillows on the market.

Knee Pillow Reviews

Knee pillows are extremely popular among side sleepers but, really, they are a great option for anyone who suffers from chronic back pain or joint pain. There are many different knee pillows to choose from, but we’ve done the hard work for you in narrowing down the options to our top 5 picks.

Here are our top 5 picks for the best knee pillows:

Top 5 Best Knee Pillows (2021 Picks)

  1. Best OverallCushy Form Knee Pillow for Side Sleepers
  2. Runner UpBonmedico Knee Pillow for Side Sleepers
  3. Best Half-Moon Knee PillowCushy Form Half Moon Bolster XLarge Knee Pillow
  4. EnerPlex CertiPUR-US Certified Never-Flat Memory Foam Knee Pillow
  5. ComfiLife Orthopedic Knee Pillow
editors choice
Cushy Form Knee Pillow for Side Sleepers

Cushy Form Knee Pillow for Side Sleepers

5/5

Knee Pillow Reviews

1. Cushy Form Knee Pillow for Side Sleepers

Side sleepers often struggle with hip and lower back pain because their knees fall together during sleep, putting excess pressure on the hips and spine. This orthopedic knee pillow is uniquely designed to encourage proper hip and spine alignment, specifically for side sleepers. In addition to relieving lower back pain, it may help with sciatic nerve pain, and pregnancy pain.

Cushy Form Knee Pillow for Side Sleepers

This orthopedic knee pillow features the classic hourglass shape and fits comfortably between the knees. It is made from orthopedic memory foam, so it adjusts to the contours of your body and relieves pressure at the same time. By keeping your spine in proper alignment all night long, this pillow supports healthy circulation as well which may keep you more comfortable at night.

The Cushy Form Knee Pillow is made from high-quality memory foam with a contoured design for specific use as a knee pillow. It features a breathable, zippered cover to help keep you cool at night and the cover is machine-washable for your convenience. You’ll also receive a free travel case.

2. Bonmedico Knee Pillow for Side Sleepers

Made with high-quality memory foam and a comfy velour cover, the Bonmedico Knee Pillow for Side Sleepers is our premium pick. This knee pillow features the classic hourglass design, made to fit comfortably between the knees to relieve pressure in the side sleeping position. It is made from soft memory foam that contours to the shape of your body while relieving pressure but still offers the right degree of support to keep your hips and spine in proper alignment.

Bonmedico Knee Pillow for Side Sleepers

The Bonmedico Knee Pillow for Side Sleepers helps prevent the development of pressure points during sleep which may help relieve both back and knee pain. In addition to premium memory foam, this knee pillow is made with a soft black velour cover that is removable and machine-washable for your convenience. You’ll also receive a handy carrying case for travel.

This orthopedic knee pillow is made with non-toxic materials to deliver hygienic comfort and support. Whether you suffer from back pain, sciatica pain, or pregnancy pain, this knee pillow can help.

3. Cushy Form Half Moon Bolster XLarge Knee Pillow

When you sleep on your back, your hips tend to sink into the mattress which throws your spine out of its natural alignment. A half-moon pillow placed under your knees helps relieve some of that pressure and keeps your hips from sinking. The Cushy Form Half-Moon Bolster Knee Pillow is specifically designed for this purpose – it is made to elevate the legs while sleeping on your back, though you can also place it under your ankles to elevate your feet for better circulation.

Cushy Form Half Moon Bolster XLarge Knee Pillow

The Cushy Form Half-Moon Bolster Knee Pillow features a high-quality construction, made from 100% visco-elastic memory foam and it is covered with a soft, breathable cover. The cover is also machine-washable for your convenience. This pillow comes with a 100% money-back guarantee as well, so you don’t have to worry if it doesn’t end up being the perfect fit for your needs.

This half-moon knee pillow is recommended by doctors, physical therapists, and sports trainers to help relieve pain. It is ideal for post-surgical recover, reducing varicose veins, and relieving arthritis pain.

4. EnerPlex CertiPUR-US Certified Never-Flat Memory Foam Knee Pillow

A high-quality knee pillow won’t flatten over time and that’s exactly what this EnerPlex CertiPUR-US Certified Never-Flat Memory Foam Knee Pillow promises. This knee pillow is made from high-quality orthopedic memory foam in an hourglass shape, ideal for wedging between your knees as you sleep. It is specifically designed to deliver the ideal combination of comfort and support while keeping your hips and spine in proper alignment to relieve pain and pressure.

EnerPlex CertiPUR-US Certified Never-Flat Memory Foam Knee Pillow

The EnerPlex CertiPUR-US Certified Never-Flat Memory Foam Knee Pillow features an ergonomic design to maximize your comfort, though it may take a few days for you to get used to using it. This pillow naturally contours to the shape of your body, relieving pressure where you need it while providing the support you crave. It has a soft, zippered outer cover that can be removed and washed for your convenience. It is also very breathable which helps keep you cool at night.

In addition to being affordably priced and thoughtfully designed, this knee pillow is made from CertiPUR-US Certified memory foam and it comes with a money-back guarantee.

5. ComfiLife Orthopedic Knee Pillow

Whether you suffer from back pain, hip pain, or sciatica, you deserve to get a good night’s sleep without paying a fortune for the privilege. This ComfiLife Orthopedic Knee Pillow is our budget pick because it is affordably priced yet still delivers on quality. It is made from premium, high-density memory foam to provide lasting comfort and it won’t go flat like other memory foam pillows. You’ll enjoy a comfortable and supportive night’s sleep each and every night.

ComfiLife Orthopedic Knee Pillow

The ComfiLife Orthopedic Knee Pillow is made with an ergonomic design to fit comfortably between your knees, keeping your hips and spine in proper alignment while you sleep. It has a breathable zippered cover that keeps you from overheating and you can simply remove it and throw it in the wash when you need to. This pillow also comes with a Lifetime Warranty and a 100% money-back satisfaction guarantee. If you don’t love it, you can return it with no questions asked.

This orthopedic knee pillow is perfect for side sleepers with its hourglass shape. Simply wedge it between your knees for optimal pressure relief and all-night support.

Do Knee Pillows Really Work?

Many people find it more comfortable to sleep on their side if they tuck a pillow between their knees. Sleeping on your side allows your knees to fall together which throws your hips out of alignment and puts a lot of pressure on the knees and spine. A knee pillow is designed to keep the knees separated but supported during sleep to keep your spine in proper alignment.

The question of the day is whether knee pillows really work. The short answer is yes, they do. The long answer requires a bit more explanation.

While you can certainly place a regular pillow between your knees, a knee pillow is uniquely designed to fit the contours of your body and is made from supportive materials. A knee pillow is much smaller than a standard pillow and it generally takes one of two shapes:

  • Hourglass – Perhaps the most common shape for knee pillows, the hourglass shape naturally aligns with the contours of your knees. This shape is generally considered very comfortable, and it helps keep the legs and knees in the proper position through the night.
  • Wedge – As an alternative to the hourglass shape, a wedge-shaped knee pillow generally has a triangular or half-moon shape. Wedge pillows are popular among back sleepers who like to place it under their knees to relieve pressure, though side sleepers can use them as well.
  • HalfMoon – The half-moon knee pillow is shaped like a cylinder cut in half longways. These pillows are generally designed to be placed under the knees of back sleepers.

A body pillow can also fulfill the function of a knee pillow while providing additional support for the arm and shoulder. Side sleepers typically cradle the body pillow between their arms and tuck it between their legs, relieving pressure on the shoulders and knees while keeping the spine aligned.

Who Should Use a Knee Pillow?

The purpose of a knee pillow is to relieve pressure in the hips and lower back by keeping the spine in proper alignment during sleep. Knee pillows can also help relieve tension in the leg muscles and may help with arthritis-related joint pain as well. If you are in need of a custom pillow recommendation for your style, please take our pillow quiz

Knee pillows are most likely to benefit the following people:

  • Side Sleepers – When you sleep on your side, your upper knee tends to fall down against your lower knee which throws your hips and spine out of alignment. This puts extra pressure on your spine which can lead to back pain. A knee pillow helps keep your spine properly aligned.
  • Back Sleepers – If you sleep on your back, you may find it difficult to get the support you need for your lower back. Without putting a pillow under your knees, your spine can relax out of its natural curve which leads to lower back pain. A knee pillow provides the support you need.
  • Pregnant Women – Many pregnant women deal with back pain and pelvic pain caused by the baby putting pressure on the spine – pregnancy can also make it difficult to find a position comfortable enough for sleep. A knee pillow helps keep your spine aligned to relieve pressure.
  • People with Restless Legs Syndrome – Restless legs syndrome (RLS) is characterized by an uncontrollable urge to move the legs and it often worsens at night which makes it difficult to sleep. Compressed nerves may contribute to RLS symptoms but using a knee pillow could help keep the spine properly aligned to avoid any nerve compression.
  • People with Back Pain – Both side sleepers and back sleepers who experience back pain can benefit from using a knee pillow. Side sleepers should use a knee pillow between their knees and back sleepers under their needs to relieve pressure on the spine.

Individual preferences may vary when it comes to sleeping positions and using a knee pillow versus a standard pillow. If you find that a standard pillow is too awkward to use or doesn’t provide the right degree of pressure relief, you may want to consider a knee pillow.

Knee Pillow Benefits

While you may receive a similar benefit using a regular pillow, placing a knee pillow between your knees should help ease pressure and relieve pain in your lower back, hips, and knees. Knee pillows are specifically designed for this purpose.

Here are some of the top benefits of knee pillows:

  • They are shaped to fit the contours of your body, keeping your knees and legs in position for proper spine alignment while you sleep.
  • They are made from supportive and pressure-relieving materials like memory foam which adjusts to the shape and weight of your body.
  • They come in several different shapes to suit your body and your sleeping preferences – consider the half-moon, hourglass, or wedge pillow designs.
  • They are generally very affordable – most decent knee pillows are priced under $30 and are made from high-quality materials.
  • They can help maintain healthy circulation as you sleep – blood flow is important to help prevent morning stiffness and muscle aches.

To enjoy the maximum benefit of a knee pillow you also need to make sure that both your regular pillow and your mattress are comfortable and supportive. Having a supportive pillow under your head helps prevent neck and shoulder pain while a supportive mattress helps ensure proper spine alignment.

Things to Consider When Buying a Knee Pillow

There are many different knee pillows on the market, but they are not all created equal. That being said, the knee pillow that works best for you may not be the ideal choice for someone else. It’s important to consider your personal needs before you start shopping so you know what to look for.

Here are the top 5 things to consider when shopping for a knee pillow:

  1. Design
  2. Material
  3. Firmness
  4. Durability
  5. Cleaning

Now, let’s explore each of these factors in greater depth.

  1. Design

The first thing to consider when shopping for a knee pillow is the design or shape. While you can certainly use a traditional pillow or a body pillow between your knees, you may experience the greatest benefit when using a pillow designed specifically for this purpose.

The three most common shapes for knee pillows are hourglass, wedge, and half-moon. The hourglass shape is ideal for side sleepers because you can tuck it between your knees. Back sleepers may prefer the half-moon shape because you can place the flat side on the mattress and rest the backs of your knees against the curved side. The wedge shape may work for back sleepers as well.

  1. Material

Once you’ve decided which knee pillow shape you prefer it’s time to think about materials. It’s important to choose a knee pillow that will support your weight and relieve pressure without falling flat during the night. Memory foam is a popular material for knee pillows.

One thing to consider with memory foam is the density. High-density foam is the most supportive, but it also tends to retain body heat. If you are concerned about sleeping hot, consider a gel- or copper-infused foam. You should also consider the material from which the cover is made because that too can affect how well the pillow breathes and dissipates body heat.

  1. Firmness

Generally speaking, memory foam is a responsive material that adjusts under your body weight. That being said, there are different firmness options available depending on the density of the foam. High-density memory foam is fairly firm while lower density foams may have a little more give. Firm memory foam can support more weight while softer foam may offer stronger contouring abilities.

  1. Durability

If you’re going to go through the trouble to pick the perfect knee pillow, you want to make sure it’s going to last. The last thing you want is a knee pillow that falls apart at the seams or falls flat during the night. Choose a pillow that is durably constructed from high-quality materials.

  1. Cleaning

Finally, think about how easy the knee pillow will be to clean. After all, you’re going to be using it night after night. Consider a knee pillow that comes with a removable, machine washable cover. The foam material itself may be more difficult to clean, though some knee pillows offer this benefit.

Frequently Asked Questions

Do knee pillows help with knee pain?

While a knee pillow probably won’t cure the cause of your knee pain, it can provide temporary relief while you sleep. If you sleep on your side and you wake up with sore knees because they rub together during the night, a knee pillow could help.

Is it good to sleep with a pillow between your knees?

Yes, depending on your sleeping position. If you are a side sleeper, putting a pillow between your knees keeps your hips from sinking and supports the proper alignment of your spine.

Where do you place a knee pillow?

It depends on your preferred sleeping position. If you are a side sleeper, place the pillow between your knees so your hips are square and your spine properly aligned. If you are a back sleeper, place the pillow on the mattress with the backs of your knees resting on the pillow.

Why does putting a pillow between your legs feel good?

Certain sleeping positions tend to put excess pressure on different parts of the body. As a side sleeper, you’re most likely to feel pressure on the shoulders and hips, though you may also wake with back pain. As a back sleeper, you may feel extra pressure on the lower spine. Placing a pillow between or under your legs can help relieve some of that pressure and keep the spine in proper alignment.

How thick should a knee pillow be?

The ideal thickness for a knee pillow is somewhere between 4 and 6 inches. It should be just thick enough to keep your knees the right distance apart that your spine is properly aligned. 

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