Skip to Content

The Best Under Knee Pillow You Didn't Know You Needed!

The Best Under Knee Pillow You Didn't Know You Needed!

Most side and back sleepers experience lower back pain during sleep due to misalignment and discomfort. An under-knee pillow will promote your body's natural alignment, leading to knee pain relief and comfort during sleep.

The best under-knee pillow is ergonomic-designed to promote proper spinal and hip alignment and lower back pain relief. It is also soft, comfortable, adjustable, breathable, machine-washable, and durable.

Sleeping on your side puts pressure on your lower knee and hip, causing pain and discomfort. Also, people who experience arthritis or lower back pain need it to elevate their feet for body alignment and pressure point relief.

We have reviewed under-knee pillows for various factors. They include adjustability, comfort, pricing, design, breathability, and durability. Here are the best under-knee pillows that you did not know you needed;

woman pillow kneeThe Cushion Lab Side Sleeper Knee Pillow

The Cushion Lab side sleeper knee pillow costs $39 and has a 4.8-star rating from 339 global reviews. It promotes a healthy spine alignment and is ideal for side sleeper back relief. Here are its features that made us recommend it as the best under-knee pillow you ought to know;

Ergonomic Contour

This under-knee pillow is designed to comfortably cradle your legs, leading to pressure relief and maximum comfort. It also features a bolstered dynamic reviving leg support to comfort your legs and spine as you toss and turn.

In addition, the pillow edge is curved, allowing it to stay between the legs during sleep. It is also moldable and adaptable to accommodate your leg's shape, form, and weight. Such leads to spinal alignment, pressure relief, and pain-free nights.

Ultra-soft, comfortable, and cushiony support

The Cushion Lab side sleeper knee pillow contains proprietary hyper-dense hyperfoam, which is soft, comfortable, and supportive. It also has CertiPUR-US certified premium Visco elastic memory foam for soft and cushiony support. The cushiony feel promotes a firm yet relaxed support, leading to pain-free sleep at night.

Breathable and Hypoallergenic Cover

This under-knee pillow contains a breathable and hypoallergenic machine-washable cover from recycled polyester rayon. It features an air-layer technology that promotes maximum air circulation and cooling, leading to cool and dry under-knee surfaces. Such makes it ideal for hot sleepers, night-sweaters, and sleepers sensitive to allergens like dust mites.

The Cushion Lab side sleeper knee pillow measures 9.5 by 8.5 by 5.5 inches. Here is what a verified client said about it;

"I have got constant pain in my left knee. This pillow is the perfect size, shape, and density to allow me to sleep comfortably on my side. You'd think shoving any old pillow between my knees would do the same thing, but this works much better. Very glad I got it and well worth the money," said Dave R.

LightEase Memory Foam Leg Pillow

The LightEase memory foam leg, knee, ankle support, and elevation leg pillow for surgery are best for leg support. With a cost of $37.99, it has a 4.6-star rating and 4,709 global ratings. Here is why it is the best under knee pillow you didn't know about;

Designed for Injured Leg

This under-knee pillow is crafted for sleepers with injured legs that need leg elevation above heart level. This is ideal for you if you have a hip adjustment, a femur replacement, ALC surgery, or arthritis. It contains premium memory foam fills, which give it a plush feel and ultra-comfort for leg elevation.

Its design increases blood circulation, reduces swelling, and alleviates pain in the sleeper's leg. In return, it speeds up recovery time by up to thirty percent.

Portable and Adaptable

The LightEase memory foam leg, knee, ankle support, and elevation leg pillow for surgery has a handle for portability. Also, you can use it in bed, on a recliner, or over a coffee table. It is very lightweight and comfortably accommodates your leg on all different surfaces.

Soft, Breathable, and Hypoallergenic

This under-knee pillow has an ultra-soft and plush pillow cover that offers a gentle and comfortable hug to your leg. In addition, it is cooling and blocks away allergens like dust mites and pollen for healthy and restful sleep.

The under-knee pillow cover is also machine-washable for ease of cleaning and maintenance.

This under-knee pillow's dimensions are twenty-nine by thirteen by nine and a half inches. Here is what a verified client said about it;

"This pillow is amazing and worth every penny! Super soft, super comfortable, and conforms perfectly to the leg. My wife has ankle surgery and using regular pillows to prop her leg up wasn't cutting it. We ordered this, and it arrived the next day. She said she could feel the difference immediately. Her leg was up and comfortable, her entire leg was supported, and there was plenty of room to ice the area," said Matt Vinson.

Luna Orthopedic Knee Pillow

The Luna Orthopedic knee pillow is ideal for all sleepers and people with sciatica. It has a 4.4-star rating from 7,525 global reviews. Here is why we recommend this as the best knee pillow you should know;

Ergonomic and Innovative Design

The Luna Orthopedic knee pillow has an ergonomic design that is orthopedic-recommended to provide ample support to sleepers. It also has a liquid-like feel that contours to your leg and offers spinal alignment for better blood circulation.

Also, the wedge-shaped part of the knee pillow accommodates and supports your leg in all sleeping positions. It also ranks as the #1 best seller for specialty medical pillows at the Luna Store on Amazon. Hence, it promotes maximum comfort and ample support, offering relief from sciatica, lower back, hip, and pressure point pain.

Its orthopedic design also makes it ideal for pregnant sleepers. It accommodates all their sleeping positions while offering ample support and keeping them comfortable.

Premium Quality

This pillow contains premium memory foam fills that are CertiPUR-US certified for quality and safety. As a result, sleepers get quality and durability out of each Luna orthopedic knee pillow for prolonged value for money.

Breathable Machine Washable Cover

The Luna orthopedic knee pillow's zippered cotton cover has longer and silkier fibers that promote airflow, improving air circulation. By fostering the knee pillow's breathability, sleepers have a cool and comfortable sleeping surface throughout the night.

The pillow is also zippered to allow you to machine-wash when needed. The ease of cleaning will enable you to sleep on a clean surface, hence promoting better quality sleep.

pillow for kneeChemical-free and Hypoallergenic

This pillow undergoes tests to keep it free from harmful chemicals. Such is ideal for sleepers that are either sensitive or allergic to strong chemical scents.

In addition, the Luna orthopedic knee pillow's outer cotton cover blocks allergens like dust mites and pollen. Such makes the knee pillow hypoallergenic, allowing sleepers sensitive to allergens to have a restful sleep.

The Luna orthopedic knee pillow costs only $19.97. In addition, the company offers every sleeper a 100-night free trial period for maximum satisfaction. Here is what a verified client had to say about it;

"I am a side sleeper and have had hip pain that kept me from sleeping all night for a long time. I used a regular pillow between my knees but did not cut it. So, I decided just to try this pillow. It has made all the difference in my sleep. Hip pain no longer disrupts my sleep.

Additionally, there was zero smell (even at the first pkg opening). The memory foam does just what it is designed to do. Super pleased," wrote C. Bingham.


Elevating your knee area or leg during sleep promotes spinal alignment and pain relief for sleepers with an injured leg. The best under-knee pillow has an orthopedic design to offer significant elevation, comfort, support, and adaptability to your leg. Before purchase, ensure that it has the ideal loft and is fit for your sleeping position.

Also read: The Best Bamboo Pillows that Support a Great Night's Sleep