Skip to product information
1 of 4
★★★★★ 4.7 4.7/765 reviews

Kopflo Luna™ Knee Pillow

Kopflo Luna™ Knee Pillow

Heart-Shaped Memory Foam Cushion for Side Sleepers

Regular price $39.90
Regular price $99.90 Sale price $39.90
Sale Sold out
Trusted by 100,000+ Customers Trusted by 100,000+ Customers
Recommended by Chiropractors Recommended by Chiropractors
30-Night Risk-Free Guarantee 30-Night Risk-Free Guarantee
Quantity

Sleeping on your side can strain the hips, knees, and lower back when the legs are unsupported. The Kopflo Luna™ Knee Pillow uses ergonomic memory foam and a contoured center design to keep the knees separated and the spine properly aligned. The result is reduced pressure on the hips and back for more comfortable, balanced sleep throughout the night.

Overview

The Kopflo Luna™ is an ergonomic knee pillow designed for side sleepers to maintain proper spinal alignment and reduce hip/lower back pain. Hourglass contoured shape (26cm long x 20cm wide x 15cm thick at center) fits comfortably between knees—keeps legs separated, prevents top knee from dropping forward, and maintains neutral pelvic position. Core uses high-density memory foam (50D)—firm enough to prevent compression under leg weight, soft enough for comfort. Adjustable elastic strap (50cm long, stretches to 80cm) secures pillow to upper thigh—prevents pillow from shifting during sleep. Charcoal grey bamboo-blend cover (breathable, moisture-wicking, removable via zipper). Weighs 450g. Ideal for side sleepers with hip pain, lower back pain, sciatica, pregnancy discomfort, or post-hip/knee surgery recovery.

Care

Remove cover via zipper on back. Machine wash cold on gentle cycle with mild detergent. Bamboo-blend fabric requires gentle care to maintain softness. Air dry flat or tumble dry low. Wash every 2-3 weeks. Memory foam core should never be washed—if wet, blot and air dry completely in well-ventilated area. Spot clean with damp cloth if needed. Elastic strap can be hand-washed separately if needed—air dry completely before reattaching. Foam may have slight odor when new; air out for 24 hours before first use

Materials

Core: High-density 50D memory foam provides firm, supportive cushioning that maintains shape under leg weight (typically 8-12kg). Density is firmer than standard pillows (25D-35D) because knee pillow must prevent compression throughout the night—if pillow compresses, knees touch and spine misaligns. Memory foam contours slightly to leg shape for comfort while maintaining structural support. CertiPUR-US certified (no harmful chemicals).

Hourglass Contoured Shape: The pillow's hourglass shape (narrow in center, wider at top/bottom) is ergonomically designed to fit between knees without slipping. Center indentation (8cm deep) cradles the lower knee (bottom leg), while upper surface supports the top knee. This dual-contact design keeps knees separated at optimal distance (12-15cm)—enough to maintain neutral hip alignment without over-separating (which can strain hip abductors).

Spinal Alignment Mechanism: When side sleeping without a knee pillow, the top leg drops forward due to gravity—this rotates the pelvis forward, twists the lumbar spine, and creates asymmetric pressure on the lower back. The Kopflo Luna™ prevents this by keeping knees separated and stacked vertically—pelvis remains neutral, spine stays straight from neck to tailbone, and weight is distributed evenly across the mattress. This eliminates the rotational stress that causes lower back pain in side sleepers.

Hip Separation: The pillow's 15cm thickness creates optimal separation between knees and, by extension, between hip joints. This reduces pressure on the greater trochanter (bony prominence on outer hip)—a common pressure point for side sleepers that causes hip pain and bursitis. Separation also prevents the top leg's weight from compressing the bottom leg, improving circulation.

Adjustable Elastic Strap: The 50cm elastic strap (stretches to 80cm) wraps around the upper thigh and secures via hook-and-loop fastener. This prevents the pillow from shifting or falling out during sleep—especially important for active sleepers who change positions frequently. Strap is adjustable to fit thigh circumferences from 40cm to 70cm. Elastic is soft and breathable—doesn't dig into skin or restrict circulation.

Cover: Charcoal grey bamboo-blend fabric (60% bamboo viscose, 40% polyester) combines natural breathability with durability. Bamboo viscose is moisture-wicking (draws sweat away from skin), temperature-regulating (stays cool in summer, warm in winter), and hypoallergenic. Polyester adds strength and reduces wrinkling. Charcoal grey color is practical (doesn't show stains) and matches modern bedroom aesthetics. Removable via hidden zipper on back.

FAQ's

Q: I'm a side sleeper and wake up with hip pain every morning. How does this pillow help? A: Hip pain in side sleepers is typically caused by two factors: (1) pressure on the greater trochanter (bony outer hip) from body weight concentrated on one point, and (2) pelvic rotation when the top leg drops forward, creating asymmetric stress on hip joints and lower back. The Kopflo Luna™ addresses both: it keeps knees separated (reducing pressure concentration on the bottom hip) and prevents the top leg from dropping forward (maintaining neutral pelvic alignment). For best results, use the pillow every night and ensure your mattress provides adequate pressure relief—if your mattress is too firm, consider a mattress topper.

Q: I'm pregnant (second trimester) and can't get comfortable side sleeping. Will this knee pillow help? A: Yes, the Kopflo Luna™ is excellent for pregnancy. As your belly grows, side sleeping (especially left side) is recommended for optimal blood flow to the baby. However, the extra weight pulls your pelvis forward, straining your lower back and hips. The knee pillow maintains neutral spine alignment and reduces hip pressure—many pregnant users report significantly improved sleep comfort. The adjustable strap accommodates changing body size throughout pregnancy. However, for full-body support, consider pairing the Luna™ with a pregnancy body pillow or the Kopflo Elevate™ (leg wedge) for additional belly/back support.

Q: The strap looks uncomfortable. Can I use the pillow without it? A: You can use the Kopflo Luna™ without the strap, but it's more likely to shift or fall out during sleep—especially if you're an active sleeper who changes positions frequently. The strap is designed to be soft and non-restrictive (elastic stretches with movement, doesn't dig into skin). If you find it uncomfortable initially, try adjusting the tightness—it should feel secure but not constricting. Many users forget they're wearing it after the first few nights. If you prefer no strap, position the pillow carefully and check if it stays in place throughout the night.

Q: I have sciatica (nerve pain radiating down my leg). Will this pillow make it worse or better? A: The Kopflo Luna™ can help reduce sciatic pain for many side sleepers. Sciatica is often caused or worsened by pelvic rotation and lumbar spine misalignment—both of which occur when side sleeping without proper knee support. By maintaining neutral spine alignment, the Luna™ reduces pressure on the sciatic nerve roots (L4-S3). However, sciatica has multiple causes (herniated disc, piriformis syndrome, spinal stenosis), and some people find that any pressure between the knees aggravates their symptoms. Start with short trial periods (30-60 minutes) to assess your response. If pain increases, discontinue use and consult your doctor or physical therapist.

Q: Can I use this pillow if I sleep on my back or stomach, or is it only for side sleepers? A: The Kopflo Luna™ is specifically designed for side sleeping and provides no benefit (and may be uncomfortable) for back or stomach sleeping. If you change positions throughout the night, the adjustable strap helps keep the pillow in place when you're on your side—you can simply move it aside when you roll onto your back. If you're primarily a back sleeper with occasional side sleeping, you may find the pillow unnecessary. For back sleepers with lower back pain, consider the Kopflo Elevate™ (leg wedge) instead, which elevates legs to reduce lumbar pressure.

View full details

Stop Hip and Lower Back Pain from Side Sleeping—Ergonomic Knee Pillow Maintains Neutral Spine Alignment and Prevents Pelvic Rotation

Contoured memory foam knee pillow with adjustable strap keeps knees separated during side sleeping—maintains straight spine from neck to tailbone, eliminates hip pressure, and prevents lower back strain