The Best Knee Pillows of 2025

How We Test Pillows

We test pillows against the same set of strict standards that we use for other pillow types, but we pay close attention to several factors that set different pillows apart. In addition to firmness, conforming, and ease of cleaning, we also measure breathability. Many sleepers choose specific materials for their cool feel. To determine how well a pillow regulates temperature, we use thermal sensors that measure heat retention and we try them ourselves too, taking notes on how warm or cool we think a pillow feels after use.

What is a Knee Pillow

Knee pillows are specialty pillows designed to fit between or beneath the knees with the goal of enhancing comfort and improving sleep posture, since poor posture can lead to problems such as improper spinal alignment, back pain, reduced flexibility, and breathing problems. People also use knee pillows to relieve pressure buildup in the lumbar region, knees, and legs.

Knee pillows are available in a variety of styles such as hourglass, wedge, and half-moon. You’ll also find knee pillows with different firmness levels and price-points. The variety of options allows sleepers to select the best knee pillow for their particular sleep position and sleep preferences.

Do You Need a Knee Pillow?

Some people need or prefer to use knee pillows to align their spine and feel more comfortable while sleeping. If you are a side or back sleeper experiencing uncomfortable spinal alignment during sleep, you may benefit from a knee pillow. Pregnant people also often opt for knee pillows to maintain healthy sleep posture.

Some of the side sleepers I know swear by knee pillows. They say that their hips and lower back don’t get as sore because the knee pillow absorbs impact and keeps their spines from curving.

Types of Knee Pillows

There are many different types of knee pillows available. When considering each model, it’s important to keep in mind your personal sleep preferences and sleep position. Some knee pillows are designed to accommodate the full length of your leg, while many have ergonomic shapes designed specifically for placement between the knees. There are also knee pillows that include straps to help keep the pillow in place.

• Hourglass: Knee pillows with an hourglass shape outline the natural contour of the legs and are designed to comfortably fit between the knees. Side sleepers may opt for hourglass knee pillows, but back sleepers generally won’t benefit from this pillow type.
• Wedge: The triangular shape of wedge knee pillows provides a gentle incline that gently elevates the legs. People who sleep on their back often place wedge pillows under the crook of the knees.
• Half moon: These half-cylinder pillows have a flat bottom that allows you to place them securely under the knees, legs, or ankles. Half moon pillows are typically used under the knees by back sleepers, but side sleepers can also place them between the knees or ankles.
• Bolster roll: These pillows are similar to half moon models but are fully cylindrical. These are most commonly used by back sleepers underneath the knees but can also be placed between the knees for side sleepers.
• Leg-length: This pillow type is distinguished by a longer shape that’s meant to support the legs of back sleepers or separate the knees and legs for side sleepers. Some leg-length pillows include contouring to enhance comfort and straps to provide a more secure fit.
• Body pillows: Some sleepers prefer full-length body pillows to elevate and support the knee alongside other body parts such as the neck, stomach, back, or hip. Pregnant people, side sleepers, and those that require all-round support during sleep may find body pillows ideal to use.

Materials, Firmness, and Construction

Many knee pillows are composed of memory foam or polyfoam encased in a fabric cover. Foam offers strong contouring and pressure relief and typically has a firm or medium firm feel. The adaptive quality of foam allows it to cradle joints without compromising too much on support. Some models, especially leg-length or body pillows, contain a polyester or down alternative fill that feels soft and plush. Covers are available in a range of materials that includes polyester and cotton.

Can You Use a Regular Pillow as a Knee Pillow?

While it is technically possible to place a traditional pillow between your knees to act as a knee pillow, keep in mind that these pillows are specifically designed to place under your head. As a result, they are generally too thin or less ergonomically suitable. Knee pillows are better suited to fit between or beneath the legs because they are specifically designed to conform to the knee and stay in place.

How to Use a Knee Pillow

You can place a knee pillow under or between your knees. The best way to use a knee pillow generally depends on your preferred sleep position. Side and back sleepers receive many benefits from knee pillows, including pressure relief and proper spinal alignment. We’ll explore some of the benefits of a knee pillow for different types of sleepers.

Knee pillows can be especially comforting during pregnancy. They can take some of the weight off your belly and ease lower back and joint pressure at the same time.

How to Pick the Best Knee Pillows

When selecting the best knee pillow, it’s important to pick a pillow that feels comfortable for you. Since comfort is subjective and knee pillows vary widely in shape, size, firmness, and materials, you’ll want to consider factors such as your sleep position and personal sleep needs when making your choice. In addition, consider whether the return policy provides enough flexibility for you to try out the product.

• Shape: When picking a knee pillow, check that the shape is compatible with your sleep position. Most knee pillows can be placed between the legs for side sleepers, while back sleepers may gravitate toward cylindrical and wedge pillows to place under the legs.
• Size and thickness: The thickness and size of a knee pillow will impact the extent to which the pillow supports your legs or knees. An overly thick pillow can cause poor spinal alignment or place strain on the lower back.
• Firmness: A knee pillow’s firmness can be subjective, so it’s important to try out the pillow to determine if it’s a comfortable firmness for you. Take note of how well the knee pillow retains its shape when weight is applied to it over time.
• Quality materials: The cover and fill material of a knee pillow can affect how comfortable it feels. Higher quality materials may improve the pillow’s moisture absorption, breathability, smell, and overall feel.
• Pressure relief: Knee pillows can help relieve pressure from your hips and lower back when lying down. They can also relieve pressure from your knees and legs. Pillows made with memory foam are especially well suited for pressure relief due to the adaptive feel.
• Temperature regulation: Most knee pillows are filled with foam, which is known for trapping heat. People who sleep hot may prefer a pillow made with a different material like latex, buckwheat, or polyester. Those who sleep hot should look for a cover made of fabric that is breathable or engineered for cooling.
• Price: Most knee pillows range from $20 to $100, although some high-end pillows may cost as much as $200 or more. The cost of a pillow depends largely on the quality of materials and construction, size of the pillow, and reputation of the pillow brand.
• Sleep trial, return policy, and warranty: Sleep trials and flexible return policies allow you to try pillows at home to determine if they are a good match. Most knee pillows also come with a warranty, with most ranging between one and five years.

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