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Daniel Noyed is reader-supported. We may earn a commission through products purchased using links on this page. Learn more about our process here

Many sleepers turn to knee pillows to increase comfort while lying down. Knee pillows are small pillows specifically made to fit between or beneath the knees. Side sleepers often use knee pillows between their knees, while back sleepers commonly put them beneath the knees.

Using a knee pillow promotes spinal alignment in side sleepers. Without a knee pillow, the upper knee rests on the lower knee. This arrangement can misalign the back, put pressure on the hips, and create pain.

Using a knee pillow between the legs while sleeping on your side or beneath the knees while sleeping on your back can reduce knee pain. Many knee pillows are ergonomically designed to fit between the legs, which helps promote proper hip and spinal alignment.

The Best Knee Pillows

Product Details

Coop Home Goods Adjustable Knee Pillow

Coop Home Goods Adjustable Knee Pillow
Solid memory foam
Coop Home Goods Adjustable Knee Pillow

The Coop Home Goods Knee Pillow stands out due to its adjustable thickness and firmness, low price, and 100-night sleep trial.

Who it's best for:
  • Side sleepers
  • Sleepers wanting adjustable firmness
  • People with allergies
  • Value-minded shoppers

The Coop Home Goods Knee Pillow is ergonomically designed to fit between the knees. As a result, it works well for side sleepers. This pillow is made of memory foam with a cover made from Lulltra fabric, which is a blend of polyester and viscose rayon derived from bamboo. Its cover features a hidden zipper that allows you to adjust the pillow’s firmness and thickness.

Inside the Coop Home Goods Knee Pillow cover are three parts: two pieces of rounded, contoured memory foam and a flat memory foam insert. Sleepers may choose to remove the insert, which decreases both the firmness and thickness of the pillow.

The adjustability of the Coop Home Goods Knee Pillow makes it a versatile knee pillow choice. This is one of the only adjustable knee pillows available on the market. Most knee pillows come in only one thickness and firmness.

People with allergies can rest assured that the Coop Home Goods Knee Pillow is completely hypoallergenic and resistant to dust mites. In fact, it’s one of the few knee pillows that has CertiPUR-US certification.

The pillow’s cover is washable, but only by hand. Coop Home Goods does not recommend putting it into a washing machine or using bleach or fabric softener on it. The cover should be air dried rather than machine dried. The foam interior portions of the pillow are not washable.

Coop Home Goods offers a 100-night sleep trial, which is more than average for a knee pillow. The pillow also comes with a five-year limited warranty.

All-Purpose Pillow

All-Purpose Pillow
Solid memory foam
All-Purpose Pillow

The All-Purpose Pillow from Tempur-Pedic features a versatile peanut shape made of memory foam that is a compact size for easy travel use.

Who it's best for:
  • Sleepers who would rather sleep with a more compact knee pillow
  • Frequent travelers
  • Those who prefer denser, firmer pillows
  • People with frequent neck and/or lower back pain

As its name implies, the All-Purpose Pillow from Tempur-Pedic offers a highly versatile design. Constructed from a single piece of dense memory foam, the pillow has ergonomic peanut shape and a firm feel. It can be placed between the knees to improve spinal alignment and prevent pain. The compact shape also makes it suitable as a travel size neck pillow. Other uses include neck rolling and lower back cushioning.

The All-Purpose Pillow comes with a removable cover that can be washed and dried in any household machine. It weighs less than a pound and is highly moldable, so fitting the pillow into luggage for trips should be fairly painless.

Shipping is free for all customers in the contiguous U.S. and Tempur-Pedic provides reasonable delivery rates for Alaska, Hawaii, and Puerto Rico. The company does not allow returns, but the pillow is backed by a five-year warranty.

Everlasting Comfort Memory Foam Knee Pillow

Everlasting Comfort Memory Foam Knee Pillow
Solid memory foam
Everlasting Comfort Memory Foam Knee Pillow

The Everlasting Comfort Memory Foam Knee Pillow has a velcro strap that keeps it in place all night long, is machine washable, and comes with earplugs.

Who it's best for:
  • Side sleepers
  • Sleepers who want a machine washable cover
  • Sleepers who toss and turn

The Everlasting Comfort Knee Pillow is designed to fit comfortably between a person’s legs. Because of its design, it works best for side sleepers.

An adjustable, removable strap makes the Everlasting Comfort Knee Pillow stand out. This strap wraps around the sleeper’s thigh, keeping the knee pillow in place. For this reason, this knee pillow works well for sleepers who move around during the night.

Sleepers do not have to use the leg strap every night. If they feel like using the pillow without the strap, they may easily remove the strap. The strap has velcro on each end that connects it to the pillow’s cover. The strap is also made with the same breathable fabric as the cover.

Both the strap and pillow cover are removable and machine washable. Many knee pillows have removable covers, but not all can be safely washed in a washing machine.

The Everlasting Comfort Knee Pillow comes with a bonus item: earplugs. The blue earplugs are made from memory foam and mold to fit the ear canal. As a result, they should feel comfortable while blocking out sound.

Everlasting Comfort offers free shipping on their knee pillow. Their knee pillow also comes with a lifetime warranty, which they call a lifetime replacement guarantee. They will send a free replacement for any pillow that breaks or becomes damaged due to manufacturing defects.

What is a Knee Pillow?

Knee pillows exist to increase a person’s comfort while sleeping. They do so by promoting spinal alignment, relieving pressure, and helping keep the body in a comfortable position.

There are many people who benefit from, or could benefit from, using a knee pillow while sleeping. For example, side sleepers and pregnant women often opt for knee pillows.

Some people use regular bed pillows beneath or between their knees. While this might provide comfort, a specifically designed knee pillow is likely to provide more comfort with less bulk. Knee pillows are much smaller than standard bed pillows and are often ergonomically designed to fit between a person’s legs.

Generally, side sleepers use knee pillows by placing them between their legs. Back sleepers, on the other hand, tend to sleep with knee pillows beneath their knees. Stomach sleepers are not likely to use or need to use knee pillows.

Without a knee pillow, a side sleeper might find their spine fall out of alignment and they may experience hip, knee, or lower back pain as a result. A knee pillow can restore that alignment, relieving joint pressure and pain.

How to Choose a Knee Pillow

Although knee pillows from different brands might look similar at a glance, they do vary in terms of materials, construction, and features. Some people find more comfort in certain knee pillows than others because of these differences.

When purchasing a knee pillow, it’s important to keep your needs and characteristics in mind. Your sleep position preference, body weight, and budget impact which pillow is best for you.

What to Consider When Purchasing a Knee Pillow

There are multiple factors to consider when shopping for a knee pillow. Knowing exactly what to look for can save time and help you purchase the best knee pillow for you.

Unfortunately, some sleep product companies use fluffy, difficult-to-decipher wording when describing their sleep products, including knee pillows. With flowery writing, they can make their knee pillows sound wonderful without sharing much concrete information about them.

We encourage you to look past vague advertising claims and examine specific features of knee pillows instead. The best pillow for you will depend on your body and personal preferences.

In this section, we delve into the various factors that are important when it comes to knee pillow shopping. With a deeper understanding of shape, support, firmness level, and more, you will be prepared to evaluate the many knee pillow options on the market.

Many knee pillows are contoured so the pillow easily fits between a person’s legs. The best knee pillow for side sleepers is designed to sit between the thighs or fit along the length of a person’s calves. There are also knee pillows shaped like cylinders and wedges, which work well for back sleepers who put a pillow beneath their knees.

In knee pillows, the amount of support provided is closely tied to the pillow’s thickness and firmness level. Generally, thicker, firmer pillows provide more support. Larger, heavier people likely need the most support, while lightweight individuals can use thinner, softer pillows and receive adequate support.

Firmness Level
Unlike mattresses, knee pillows don’t usually come with a firmness rating. Instead, companies usually describe their knee pillow’s firmness in words, which can be subjective. Trying out a knee pillow is the best way to determine if its firmness is adequate for you. Reading customer reviews from knee pillow owners of a similar build to you can also help.

Pressure Relief
Knee pillows provide pressure relief indirectly by promoting spinal alignment. When the spine is not properly aligned, pressure develops in the spine and hips. Knee pillows can also directly relieve pressure in the knees. The thickness and firmness of the knee pillow impacts how well it relieves pressure.

The prices of knee pillows range greatly, with the least expensive costing less around five dollars and the most expensive costing over $100. That said, most knee pillows fall in the $20 to $60 range. Prices come from the product’s materials and construction, as well as from the brand’s reputation.

Quality Materials
Most knee pillows are made of memory foam and have some type of fabric cover. High-density memory foam is generally higher quality than low-density memory foam. Unfortunately, not all manufacturers share details about the memory foam they use. Reading customer reviews may be more useful for determining product quality.

The size and weight of a knee pillow is relevant to people who travel or sleep outside the home. Some knee pillows are small, while others are nearly as large as traditional pillows. Knee pillow weights also vary. Manufacturers generally list their knee pillows’ measurements and weight online.

Temperature Regulation
Temperature regulation refers to how warm a pillow becomes in response to body heat. A knee pillow that regulates temperature well stays relatively cool. Most knee pillows are filled with memory foam, which tends to trap heat. Often, covers are made with cooling, breathable fabrics to counteract this tendency.

Who Should Use a Knee Pillow?

Side sleepers and pregnant women are most likely to benefit from using a knee pillow. ack sleepers and people with back or hip pain can also benefit from using a knee pillow.

  • Side Sleepers: Knee pillows promote spinal alignment in side sleepers, relieving pressure from their hips and lower back. Without a knee pillow, side sleepers often find their spine coming out of alignment. Their uppermost leg puts weight on their lower leg. As a result, their hips shift and experience more stress. Using a knee pillow can reduce hip and back pain in side sleepers.
  • Pregnant Women: Pregnant women often experience leg cramps and back pain. Using a body pillow or small knee pillow may help by promoting proper spinal alignment.
  • Those with Back or Hip Pain: People with back or hip pain might experience relief by adding a knee pillow to their sleep routine. Sometimes pain is caused or exacerbated by improper spinal alignment overnight. Using a pillow to increase support and pressure relief can help.
  • Back Sleepers: Back sleepers tend to benefit most from a knee pillow placed beneath rather than between the knees. Placing a pillow beneath the knees of a back sleeper promotes the spine’s natural curve. It also reduces pressure put on the lower back.

Who should avoid knee pillows:

  • Sleepers Who Move Frequently: Some people toss and turn too frequently to keep a knee pillow in place overnight. They may try a knee pillow with a velcro strap, but that might not be enough to keep the pillow in place all night.
  • Stomach Sleepers: Stomach sleepers generally don’t need knee pillows because their sleep position doesn’t affect spinal alignment in the same way. Instead, they might want to put a pillow beneath the hips.

What Types of Knee Pillows Are Available?

The most common knee pillow type is shaped like an hourglass, and all of our recommendations feature variations on this shape. Still, there are knee pillows of other shapes available, so you should be aware of them.

  • Hourglass: The hourglass knee pillow is thinner in the middle and thicker at the edges. It fits well between a person’s thighs and is designed to stay in place. Hourglass knee pillows work best for side sleepers wanting to keep their knees separated.
  • Body Pillow: A body pillow is usually the width of a bed pillow, but double the length. Body pillows work well for side sleepers and pregnant women. In addition to putting space between the knees, they give people something to hug.
  • Half Moon: The half-moon shaped pillow looks like a cylinder with one flat edge. It’s commonly put beneath the knees by back sleepers, but can also be put between the legs by side sleepers.
  • Cylinder: A cylindrical knee pillow is similar to the half moon pillow, but it’s completely round instead of having one flat side. This pillow is most commonly used by back sleepers beneath the knees.
  • Wedge: Most wedge knee pillows look triangular from the side, but there are also rounded versions. Generally, these pillows are used by back sleepers beneath their knees. Some are designed to elevate the legs.
  • Heart: The heart-shaped knee pillow is the smallest on the market and usually the least expensive. It fits between the knees and thighs of side sleepers and often includes a strap to hold it in place.

Frequently Asked Questions About Knee Pillows

Can I use a regular pillow as a knee pillow?
Yes, but it might not be as comfortable as a designated knee pillow. A regular pillow is often too thin, too thick, or too long to fit properly beneath or between the knees. Knee pillows, however, are specifically designed to fit between or beneath the knees. As a result, they tend to work better at providing comfort.

How much do knee pillows cost?
Most knee pillows cost between $20 and $60. That said, there are knee pillows that sell for as little as five dollars and for as much as over $100. The price of a knee pillow depends on its size, the materials it contains, and the brand that manufactures it.

How do I clean a knee pillow?
Most knee pillows come with a removable, washable cover. Some knee pillow covers may be washed in a washing machine, while others should be washed by hand. Knee pillow owners should carefully read the manufacturer’s cleaning instructions prior to washing their knee pillow. Incorrectly washing or drying a knee pillow could damage it and void the warranty.

Where can I buy a knee pillow?
Many online and in-person stores that sell mattresses, bedding, or traditional pillows also sell knee pillows. We suggest visiting the sites of the knee pillow companies we’ve shared on this page or doing a simple search for knee pillows to find more options. When buying a knee pillow online, check to see if the company offers free shipping and free returns.

How long do knee pillows last?
Knee pillows can last anywhere from one year to several years. Read customer reviews to get an idea of how long people have owned knee pillows made by particular brands. Sometimes knee pillows are thrown away for hygiene reasons. Washable, hypoallergenic knee pillows can stay hygenic longer.

Are knee pillows adjustable?
Some, but not all, knee pillows are adjustable. Be sure to carefully read the packaging or manufacturer’s website to determine if a knee pillow is adjustable. Adjustable knee pillows generally unzip and have removable portions. Changing the contents of a knee pillow also adjusts its thickness and firmness.