I’ve been using this orthopedic knee pillow — here's why you should get one

The Coop Adjustable Knee Pillow on a bed
(Image credit: Coop)

Using the right pillow beneath your head can help target a number of sleep concerns, but can slipping one between your knees have the same benefit?Orthopedic knee pillows have gained popularity online and among chiropractors, but are they really worth it?

Pairing the best mattress for your sleep position with the best pillow for your needs can make a huge difference to your comfort levels. Knee pillows might not be part of the traditional bed set up, but they've gained praise for providing side sleepers with pressure relief while promoting good sleep posture. As a side sleeper with occasional back pain, I decided to try one out.

I tried the Coop Adjustable Knee Pillow and I was surprised at how quickly I felt it benefitting my sleep. And it's not just me – I also spoke to a chiropractor about the advantages of using a knee pillow. Here's what I discovered...

Coop Adjustable Knee Pillow:$40 @ Amazon

Coop Adjustable Knee Pillow: $40 @ Amazon
This ergonomically designed knee pillow contains hourglass-shaped CertiPur-US certified memory foam. This unusual shaping allows the pillow to fit between the knees when side sleeping, while the removable inserts ensure you can adjust the feel and loft to suit your unique sleep needs. Sales are semi-regular at Coop Sleep Goods, but this pillow does sell out from time to time.

How does a knee pillow help you sleep better?

Picture yourself lying on your side and consider where the body presses into the mattress: at the ear, shoulder, hip, knee and ankle. These are known as the pressure points, and while a medium to high loft bed pillow bridges the gap between your ear and shoulders, a knee pillow helps relieve the pressure at other points of the body.

“Most often, the inside of the knee on the top leg has increased pressure in the side sleeping position," explains says Dr Kevin, director of chiropractic operations at The Joint Chiropractic. "Using a pillow between the knees can help alleviate this stress and promote spinal alignment.”

An orthopedic knee pillow, shaped specifically to fit between the knees, can provide this pressure relief without disrupting the comfort of a side sleeping position. It can be particularly useful for those who experience knee pain or lower back pain when lying on their side.

Coop Knee Pillow

(Image credit: Future)

My experience with Coop Home Goods adjustable knee pillow  

I’m a side sleeper who loves curling up in a ball, especially during cold winter nights. This curved position could worsen my lumbar pain, but while lying on my back helped with these aches, ultimately, back sleeping isn't for me. The Coop Adjustable Knee Pillow caught my eye as it promised to "decrease back pain" and with four removable memory foam inserts, I could customize it to suit my sleep preferences and build.

How did I find it? After my failed back sleeper experiment I was skeptical, but I fell in love with the Coop Adjustable Knee Pillow almost instantly. Once I adjusted the firmness level, that is. Removing one of the one-inch foam blocks ensured it fit just right.

Opening the Coop knee pillow

(Image credit: Future)

I'd used a standard bed pillow between my knees before and hadn't found it useful (or comfortable). But the hourglass shape of the Coop Pillow contoured against my knees offering ample support and making it easier to maintain good sleep posture. The foam provided instant comfort, reducing the pressure on my knees and hips.

The Coop Pillow definitely helped me get more restorative sleep. If I’m to nitpick, I would say the absence of a strap to keep it in place is a bit bothersome. The pillow tends to move around when you’re tossing and turning, but not enough to wake me up or cause discomfort. After trying it for seven days straight, I can say that I'm obsessed.

5 benefits of sleeping with a knee pillow

Compared to a regular pillow placed between your knees, a knee pillow is designed to provide pressure relief and support, especially for those with hip or knee pain. Here are the other ways it enhances your sleep:

1. Gives immediate pressure relief: The additional support to your knees will help align your hip and pelvic region. This can aid relaxation, potentially helping you fall asleep quicker.

2. Relieves hip discomfort: Frequently changing position as you sleep can strain your hips. Using a knee pillow encourages you to stay in one place and not toss and turn.

3. Maintains healthy spinal alignment: If your top leg slips forward when you're in a side sleeping position, it can put pressure on the spine. A knee pillow helps you keep the knees stacked for better sleep posture.

Coop Knee Pillow

(Image credit: Coop Home Goods)

4. Potentially improves blood circulation: Experts suggest a pillow between the knees can improve blood circulation by keeping the legs in an elevated position. This can potentially even prevent conditions such as varicose veins.

5. Can help with muscle cramps: Studies show that nocturnal muscle cramps (NLC) are a common issue faced by people over the age of 60, pregnant women and athletes. Sleeping in an uncomfortable position can further worsen this condition. A knee pillow will help you maintain the correct posture while increasing the blood flow to your legs, thereby reducing muscle cramps during sleep.

Who needs a knee pillow?

While many people can potentially benefit from a knee pillow, these are the people (and sleep styles) it will suit best:

  • Side sleepers: As Dr Lee explains above, using a knee pillow takes off the stress of your hips and knees, which are the major pressure points when sleeping on your side. (They can also benefit stomach sleepers trying to switch to a side sleeping position).
  • Pregnant women: Leg cramps are a common complaint of pregnant women. A knee pillow can provide pressure relief for the legs, for fresher mornings.
  • Back sleepers: Instead of slipping a pillow between your knees, back sleepers should place one under the knees to maintain the natural spine curvature.

3 knee pillows to shop today

1. Vaunn Medical Memory Foam Pillow:$29.99 at Amazon

1. Vaunn Medical Memory Foam Pillow: from $29.99 at Amazon
Similar to the Coop Pillow, the Vaunn has an ergonomic shape to contour to your knees, providing relief to your legs, hips and back. Made from premium high-density memory foam to be both supportive and durable, the Vaunn knee pillow comes with a washable cover and a one-year warranty. Affordable even at full price, keep an eye out for regular discounts.

2. Everlasting Comfort Knee Pillow: $32.99 at Amazon

2. Everlasting Comfort Knee Pillow: from $32.99 at Amazon
With straps to keep it in place, the Everlasting Comfort Knee Pillow is a good choice for those who toss and turn. It features a dual concave design which ensures comfort for side sleepers, pregnant women or those with sciatic pain, hip pain or lower back issues. The brand also includes two pairs of memory foam earplugs to block out noise and have an uninterrupted night's sleep – a nice bonus.

3. ComfiLife Cooling Knee Pillow: $17.95 at Amazon

3. ComfiLife Cooling Knee Pillow: from $17.95 at Amazon
If you're a side sleeper prone to sleep hot, the ComfiLife knee pillow is a good choice. The high-quality memory foam comes in a cooling and air-wicking fabric, while the adjustable strap helps keep the pillow in place even if you're restless on a warm night. This affordable pillow is frequently discounted.

Becky George
Sleep Staff Writer

 Becky is a Sleep Staff Writer at Tom’s Guide covering all things sleep-related including product reviews, research studies, news and explainers. She works on specialist mattress content and is responsible for bedding buyer’s guides like pillows for all sleepers, focusing on popular brands such as Tempur-Pedic, Avocado and more. Becky is a PPA accredited journalist who is keen to explore the intricacies of sleep, its effects on skincare, mental wellbeing and work performance. While not thinking of sleep, she can be seen reading in cosy bookshops or learning about global food culture.