Coop Sleep Goods Adjustable Knee Pillow — personalized support for side sleepers. The Coop Adjustable Knee Pillow is an orthopedic knee pillow priced at $45.00, cut from solid, CertiPUR-US® certified memory foam into an ergonomic hourglass shape that molds to your body for firm support. A removable 1" insert lets you adjust the thickness and density, and the super-breathable Lulltra™ cover (polyester and bamboo-derived viscose rayon) is machine-washable. It measures 12 in (L) x 7 in (W) x 8 in (H), is HSA/FSA eligible, and is rated 4.7/5 stars from 255 reviews, with 82% giving it 5 stars. It is backed by Coop's 100-Night Sleep Better Guarantee and a 5-Year Warranty.
Best for:
- Side sleepers looking to align hips and spine by placing the pillow between their knees
- Anyone seeking relief from hip pressure, back pain, or knee, leg, and hip discomfort during sleep
- People who have tried regular pillows between their legs and want targeted, contoured support instead
- Shoppers who want to fine-tune thickness and firmness with a removable 1" insert
- Buyers using HSA/FSA funds and anyone who wants a risk-free 100-night trial
How it compares: Unlike a traditional pillow placed between the legs, this knee pillow is specifically engineered for side sleepers and joint support: its ergonomic hourglass shape, solid memory foam, and adjustable insert provide targeted alignment and pressure relief that standard pillows can't match. The removable insert also sets it apart from fixed-shape knee pillows—you can take it out for a little less lift or keep it in for more support.
- How do you use a knee pillow? Knee pillows bring ideal alignment throughout the night, especially for side sleepers. The best way to use a knee pillow is to place it between your knees in a slightly forward bent position, which should allow your hips to rest in a neutral position. The contoured knee pillow is designed with an hourglass shape to take the pressure of your upper leg off your hips, to bring proper spinal alignment, and to decrease lower back pain.
- What does putting a pillow between your knees do? There are many benefits to sleeping with a pillow between your knees. Putting a firm pillow between your knees helps to keep them aligned along with your spine. Additionally, it may also reduce stress on your hips. If you are experiencing poor spinal alignment, bad sleep posture, or knee pain, consider using an orthopedic knee pillow to alleviate some discomfort. The Coop Orthopedic Knee Pillow comes with a 100-night risk-free trial.
- Can I use a regular pillow instead of a knee pillow? Although placing a traditional pillow between your legs when sleeping may provide some pain relief, knee pillows are specifically designed to enhance pressure relief and bring maximum support for knee pain, leg pain, or hip pain. The Coop solid memory foam knee pillow insert can be adjusted for any sleep position so that all types of sleepers can find an elevation level that is comfortable for them.
- What makes the Coop Adjustable Knee Pillow different from a regular pillow? The Coop Knee Pillow is specifically engineered for side sleepers and those needing joint support. Its ergonomic hourglass shape, solid memory foam, and adjustable insert provide targeted alignment and pressure relief that standard pillows cannot match.
- Can I adjust the height or firmness of the knee pillow? Yes! The removable 1" insert lets you control both thickness and density, so you can dial in the perfect level of support for your body and sleep style.
- Is the Adjustable Knee Pillow machine washable? Yes, the removable Lulltra™ cover is machine washable. Wash cold on a gentle cycle, tumble dry low, avoid fabric softener or bleach, and ensure the cover is fully dry before use. The foam insert should be spot cleaned only.
- What materials are used in the Adjustable Knee Pillow? The cover is made from Lulltra™ fabric (polyester and bamboo-derived viscose rayon), and the core is 100% CertiPUR-US® certified memory foam. The cover is machine-washable; the foam insert should be spot cleaned only.
- What certification does the Adjustable Knee Pillow have? The Adjustable Knee Pillow is made with 100% CertiPUR-US certified memory foam. Our foams are tested by independent, accredited laboratories to ensure they meet strict standards for content, emissions, and durability.
- What is the 100-Night Sleep Better Guarantee? Coop offers a 100-Night Sleep Better Guarantee on the Adjustable Knee Pillow, allowing you to try the product risk-free and return it if you are not satisfied.
- Does the Adjustable Knee Pillow come with a warranty? Absolutely. Coop offers a 100-Night Sleep Better Guarantee and a 5-Year Warranty, so you can try the pillow risk-free and with confidence.
- Is there a knee pillow for back sleepers? Yes—the Coop solid memory foam knee pillow insert can be adjusted for any sleep position, so all types of sleepers can find an elevation level that is comfortable for them.
- Is there a knee pillow for back pain? Yes. According to the page, the adjustable knee pillow relieves hip pressure, aligns your spine, and helps reduce back pain.
- What do the reviews of the Coop Adjustable Knee Pillow say? It is rated 4.7/5 stars from 255 reviews, with 82% giving it 5 stars, and Coop reports that 86% of users sleep better with Coop.
What customers say: Rated 4.7 out of 5 stars based on 255 reviews, with 82% of reviewers giving it 5 stars. Coop also reports that 86% of users report sleeping better with Coop.
Pairs well with
- Shipping Protection — a $0.00 add-on frequently bought together with the Adjustable Knee Pillow.
Shipping is free on orders over $75, and returns are free—see the full returns policy for details.
Try the Coop Adjustable Knee Pillow risk-free for 100 nights and discover the difference in your sleep quality.