The Best Knee Pillows 2021

Updated on March 4, 2021 While all product recommendations are chosen independently, we may receive compensation for purchases made through our site. Learn more about how we make money here.

Knee pillows aren’t the first thing that comes to mind when thinking about a good night’s sleep. For a surprising number of people, incorporating this sleep-aid into their nightly routine can make a world of difference. Sleeping with a pillow under or between your knees reduces stress on your spine and keeps it aligned. This can provide relief for a variety of sleepers, from those dealing with back pain, pregnancy-related discomfort, or restless leg syndrome, to side and back sleepers.

While you can certainly use a regular pillow for your knees, a lot of manufacturers make pillows specifically for this purpose, with different models aimed at different health conditions and sleeping habits. In this guide, we’ll go over the benefits of a good knee pillow, the different types, what to look out for when going shopping, and why simply folding a regular pillow in half might not be the most effective solution. We’ve also picked out our top five choices of knee pillows currently available on the market, based on their benefits, reviews, and specs.

Our Top Picks

ComfiLife Orthopedic Knee PillowOrthopedic Knee PillowHeat-sensitive contouring, stays firm and in place, lifetime replacement warrantySee Best Price
Everlasting Comfort Knee PillowMemory Foam Knee PillowRemovable leg strap, small but effective, lifetime replacement guaranteeSee Best Price
Stars United Knee PillowKnee PillowSoft and comfortable, lemon-scented memory foam, money-back guaranteeSee Best Price
rFxxiZSMLSLKnee PillowNatural cotton cover with strap, hypoallergenic memory foam won’t flatten over time, lifetime warrantySee Best Price
KidFULSLKnee PillowCooling gel layer, won’t flatten over time, firm and versatileSee Best Price

ComfiLife Orthopedic Knee Pillow

Why we like it:

  • Heat-sensitive contouring keeps it moving with your body
  • High-density memory foam stays firm
  • Pain relief for multiple parts of the body
  • Lifetime satisfaction and replacement warranty

ComfiLife logo

ComfiLife Orthopedic Knee Pillow

The Orthopedic Knee Pillow from ComfiLife is a popular choice as it is designed specifically to keep your spine supported and aligned with your hips and legs. This helps with back, joint, knee, and hip pain.

Made out of durable, high-density, heat-reactive memory foam. Meanwhile, its removable and machine-washable cover is woven out of a breathable polyester that keeps air flowing. Its hourglass design keeps it in place and supporting you throughout the night.

The pillow also relieves pain in multiple parts of the body and will keep you sleeping soundly.. It comes with free shipping and a “lifetime satisfaction and replacement warranty”, so you can get your money back if it isn’t a good fit.


Everlasting Comfort Memory Foam Knee Pillow

Why we like it:

  • Dense pure memory foam
  • Free earplugs
  • Adjustable and removable strap keeps the pillow between your legs
  • Lifetime replacement guarantee doesn’t require you to send in your old product

Everlasting Comfort logo

Everlasting Comfort Knee Pillow

Small but effective, Everlasting’s Comfort Memory Foam Knee Pillow is designed to keep your legs bent, apart, and aligned with your knees and spine. Specifically designed for side sleepers and pregnant women, it’s also great for heavier sleepers and those with arthritis. It’s able to relieve pain from your leg up to your back.

While the pure memory foam, compact size, and free earplugs are all great bonuses, the Comfort Memory Foam Knee Pillow’s biggest advantage is its strap. Adjustable and removable, the strap keeps the pillow snug between your knees, so even more active sleepers–like those with restless leg syndrome–can stay aligned even if they’re tossing and turning.

Everlasting’s pillow comes with a removable and machine-washable cover, as well as a lifetime replacement guarantee that allows you to get a new one without sending in your old product.


5 Stars United Knee Pillow

Why we like it:

  • Soft, comfortable, and supportive
  • Can also be used as a neck pillow or for chest support
  • Lemon-scented to keep things fresh
  • Money-back guarantee

5 Stars United logo

5 Stars United Knee Pillow

This Knee Pillow by 5 Stars United fixes some of the big issues people usually have with high-density memory foam. Although some sleepers can find the memory foam used in knee pillows musty-smelling with use and overly firm, this pillow’s lemon-scented foam keeps it smelling fresh, while reviewers name its unique softness as a major draw.

This doesn’t mean it lacks support–rather, the pillow softens with heat to stay contoured to your legs, while still keeping things stabilized, in place, and aligned.  It is great for back and hip pain relief, as well as for people who’ve just gotten surgery.

5 Stars United’s Knee Pillow can also be used as a neck pillow or for chest support when using the computer or watching TV. It comes with a removable and machine-washable cover that boasts hypoallergenic and anti-pilling qualities, as well as a money-back guarantee.


Prime Athletics Knee Pillow

Why we like it:

  • Will not flatten over time
  • Unique natural cotton cover with a leg strap
  • Hypoallergenic memory foam
  • Lifetime warranty

Prime Athletics logo

Prime Athletics knee pillow

Praised for delivering luxury quality at an affordable price point, this Knee Pillow from Prime Athletics is a good choice for sleepers who want comfort without having to skimp on medical effectiveness. Its materials set it apart: its hypoallergenic memory foam will not flatten over time, as many other memory foam pillows do. Its cover and removable leg strap are made out of natural cotton, not the synthetic fabric of typical knee pillows.

It stays soft and comfortable while also providing the usual spinal alignment and support properties that relieve back, knee, joint, and sciatic nerve pain. Good for side sleepers, pregnant women, and people with restless leg syndrome, it can also be used as an “abduction pillow” for people who need to keep their legs immobilized when they’re recovering from hip surgery.

Prime Athletics’ Knee Pillow comes with a lifetime warranty, as well as a free traveling case.


AnboCare Knee Pillow

Why we like it:

  • Cooling gel layer eliminates heat
  • Organic velour cover
  • Will not flatten over time
  • 30-day money back guarantee

Anbocare Logo

AnboCare knee pillow

Despite its many benefits, memory foam’s biggest drawback is how it traps heat. AnboCare’s Knee Pillow seeks to take care of that by adding a layer of cooling gel to its “high-rebound” memory foam. This, plus the breathable organic velour cover, means you can keep your spine aligned without worrying about overheating.

The largest of the products listed here, this knee pillow also keeps its shape without flattening over time, as a lot of knee pillows do. In fact, it’s so firm that it can also be used to elevate feet or legs.

Like other hourglass knee pillows, AnboCare’s product is good for back, hip, knee, and sciatic nerve pain. The only drawback may be its money-back guarantee: you have to claim it within 30 days to get a replacement or a full refund.


Knee Pillow Buyer’s Guide

It can be challenging to get a good night’s sleep if you’re dealing with back pain that interferes with your comfort and rest. A good knee pillow can greatly improve your sleep hygiene, though, by taking the stress off your spine and keeping it aligned–both of which help with back pain. In this section of the guide, we’ll give you some tips on looking for one that suits your needs.

When shopping for a good knee pillow, you should pay attention to its cleaning and care, durability, firmness, materials, price, shape, size and weight, and warranty and return policies.

What are the Benefits of Knee Pillows?

Knee pillows have different benefits depending on your sleep habits and the type of health condition(s) you’re living with. According to the University of Rochester Medical Center, sleeping with a pillow under your knees will “reduce stress on your spine and support the natural curve in your lower back,” while sleeping with one between your knees will “prevent your upper leg from pulling your spine out of alignment and reduce stress on your hips and lower back.” They can also provide stability, help with blood circulation, relieve joint, knee, and sciatic nerve pain, and keep legs still. While most sleepers would benefit from these, side and back sleepers, pregnant women, people with restless leg syndrome, and people with back pain will find knee pillows especially helpful.

Side Sleepers
When you sleep on your side, your upper leg may pull your spine out of alignment and put stress on your hips and lower back. A firm pillow between your knees is a great fix for this. Hourglass-shaped knee pillows are designed for side sleepers, who also have their pick of half-moon-shaped knee pillows and body pillows.
Back Sleepers
People who sleep on their backs may experience pain in their lower back because of lack of spinal support. A firm pillow is recommended under your knees to support your spine and its natural curve. Wedge- and half-moon-shaped knee pillows are the most suitable for back-sleepers.
Pregnant Women
According to Samaritan Health Services, pregnant women may deal with back aches from their babies putting pressure on their spines, as well as pelvic pain. To deal with this, it is recommended that pregnant women sleep on their left sides with pillows between their knees to better support their bellies and backs.
People With RLS
When someone has Restless Leg Syndrome (RLS), they feel an “uncontrollable urge” to move their legs that usually gets worse at night and at rest. People with RLS should sleep with a pillow between their knees since it could help with symptoms being triggered by compressed nerves.
People With Back Pain
Side sleepers with back pain should put a pillow between their knees. Back sleepers should consult a doctor or physical therapist about whether this would make their specific back pain worse.

Can I Fold My Regular Pillow Instead of Using a Knee Pillow?

While sticking a regular pillow between or under your knees is certainly an option, you might not get as many benefits as you would from a knee pillow. Knee pillows are specifically designed to alleviate the pain and discomfort that comes with different health conditions and sleep habits. They’re often made out of dense memory foam that won’t go flat halfway through the night. They are built with the ideal spacing to keep your knees apart and your spine aligned and designed with contouring material or straps to keep your legs in place.

Regular pillows, on the other hand, may not have the right firmness, height, or shape, even if you double them up. They won’t contour to your body as well as a knee pillow, nor would they have anything in place to keep them from shifting or flattening during sleep. If you do choose to use a regular pillow, we’d suggest you use a memory foam pillow with a high density.

Types of Knee Pillows

If you choose to go with a knee pillow, you should know that they aren’t one-size-fits-all. Like with any sleep aid, there are different types of knees pillows. The biggest difference is in shape. Knee pillows come in half moon, hourglass, and wedge shapes. Body pillows can also be used for knee pillows. Each of these comes with their own pros and cons. Which one you end up choosing will depend on your personal sleep habits, needs, preferences, and health conditions.

Body Pillow
Half Moon
Hourglass Pillow
Wedge Pillow
Body Pillow

Snuggle Pedic Body Pillow Spanning the length of your body, these pillows are designed for a variety of purposes. They are ideal for side sleepers, people who don’t need much support, and people who don’t need to keep their legs in place. Half Moon

Half Moon

Half Moon Pillow Shaped like long rolls cut in half, these pillows are able to be used between the knees, under the knees, or under the neck. They are great for relieving lower back pain. They’re suitable for side sleepers, back sleepers, and pregnant women.

Hourglass Pillow

AnboCare knee pillow Shaped like hourglasses, these pillows go between the knees and are aimed at keeping your legs in place and apart, and your spine de-stressed and aligned. They’re best for side sleepers, pregnant women, people with back pain, and people with RLS (especially when they come with straps to keep your legs in place).

Wedge Pillow

Xtreme Comforts 7" Memory Foam Bed Wedge Pillow Shaped like a large, firm wedge, these pillows are designed to go under the knees for back sleepers. Wedge pillows are aimed at keeping your legs elevated and your blood circulating, as well as taking the pressure off your back. They are great for people with back pain and restless leg syndrome.

Knee Pillow Considerations

Although it’s the main distinguishing factor in knee pillows, shape is far from the only thing you should consider when determining which knee pillow is the best one for you. Before you put one in your cart, you should also carefully consider everything in the following list. The difference can be between a solid, affordable knee pillow that will serve your pain relief needs for life, and one that could end up giving you even more discomfort.

  • Cleaning and Care: Since your knee pillow will be used nightly, it’s important that you find one you can easily care for and clean. Make sure you find one with a machine-washable cover since the pillow’s material (most often high-density foam) can be difficult to clean regularly.
  • Durability: Because your knee pillow will be in constant contact with your legs, it’s important that you choose one durable enough to withstand bodyweight and the wear and tear that comes with movement and friction throughout the night. This can be an especially important factor for pregnant sleepers and those with RLS.
  • Firmness: Depending on your needs, you may want to choose your knee pillow based on how firm it is. Firmer pillows will handle more weight and provide more support, while softer pillows can contour to your body better and provide more comfort.
  • Materials: Most knee pillows are made out of high-density foam. This means they tend to pack heat, which can be an issue for people who tend to sleep hot. If this is important, you may want to consider looking for a knee pillow that comes with cooling properties, like one that incorporates cooling gel or one with a breathable cover.
  • Price: Knee pillows can sell for as little as $11 and run upwards of $150, but you can typically find a high-quality, effective, and long-lasting knee pillow for around $30. Of course, what’s effective for one person may not be effective for another, and certain sleep habits and health conditions may require more expensive pillows.
  • Shape: As we broke down earlier, knee pillows typically come in one of four different shapes: body pillows, half-moon, hourglass, and wedge. These provide different benefits for different people, so you may want to test all of them out to see which one best suits your needs.
  • Size and Weight: Knee pillows come in all sorts of sizes and weights. Hourglass knee pillows that go between your knees are typically small and weigh less than 2 pounds, while other types, especially those that go under your knees, can be considerably larger and heavier. It’s important to find one that can support your weight, won’t be too heavy or cumbersome, and won’t be so small it doesn’t make a difference.
  • Warranty and Returns: It’s important to find a knee pillow with a good warranty and/or return policy. This way, if it turns out the one you ordered doesn’t work, you can easily swap it out for another, and if it does, you can keep for life.