KNEE PILLOWS·EVERLASTING COMFORT
Everlasting Comfort Under-Knee Pillow
4.5 · 5,683 shopper ratings
Editor score8.3/10
Best for: Back sleepers with lower-back pain
Lowest price we found
$29.99
At Amazon (as of – Details)
Buy at Amazon · $29.99 ↗Review updated 2026-07-04
Sleeper
Back sleepers
Shape
Under-knee bolster
Fill
Memory foam
The back-sleeper's pick — an under-knee bolster that lets the knees bend to flatten the lumbar arch, and the highest-rated pillow here.
Everlasting Comfort's under-knee pillow solves a different problem than the side-sleeper contours: placed under the knees when you lie on your back, it lets the knees bend slightly, which flattens the arch in your lower back and unloads the lumbar spine — a genuine relief for back pain and post-surgery recovery. The half-cylinder memory foam is firm enough to hold the lift all night, with a cool-touch washable cover. At 4.5 stars it's the best-rated pillow in this lineup. It's back-sleeping only, and taller sleepers may want more height than its single loft provides.
Price & where to buy
Prices checked 2026-10-11amazon
AmazonBest price✓ Fast delivery · easy returns
Back sleepers
$29.99
(as of – Details)
Walmart
Walmart
Availability + price vary by store
Price varies
Not price-checked
Target
Target
Availability + price vary by store
Price varies
Not price-checked
Prices shown were last checked on 2026-10-11 and can change at any time — the price on the retailer's site at checkout is the one that applies. Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.com at the time of purchase will apply to the purchase of this product. As an Amazon Associate and affiliate we may earn a commission on purchases made through these links, at no extra cost to you.
How our prices work
We show the price at our recommended retailer as at our last check of that offer (2026-10-11) and the manufacturer's list price for comparison. Amazon prices come from Amazon's own product data service and are refreshed twice a day; each one shows the date and time Amazon gave it, and one older than 24 hours is replaced by “Check price”. Other retailers' prices are checked by hand and show the date of that check. Retail prices move constantly, so the price on the retailer's own page at checkout is the one that applies. More on Amazon prices
Should you buy it?
What we like
- Under-knee lift flattens the lumbar arch
- 4.5 stars — highest rated here
- Firm memory foam holds the lift all night
- Cool-touch washable cover
What to know before buying
- Back sleeping only — not for side
- Single loft may be low for tall builds
- Memory foam retains some heat
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At a glance
SleeperBack sleepers
ShapeUnder-knee bolster
FillMemory foam
StrapNo
CoverCool-touch, washable
Best forLower-back relief
RelievesLumbar / post-surgery
Rating4.5 stars
How it scores
How our 8.3/10 breaks down — rated on the dimensions that matter most for knee pillows, from published specifications and third-party test data, not the marketing.
Alignment support
8/10
Comfort
8.5/10
Breathability
7.5/10
Durability
8/10
Value
8.5/10
Featured in our guides
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Compare with alternatives
Quick verdicts for the knee pillows most often considered alongside the Everlasting Comfort Under-Knee Pillow.
VS·HEAD-TO-HEAD
Everlasting Comfort Under-Knee Pillow vs ComfiLife Knee Bolster for Back Sleeping
The back-sleeper bolster from the category's bestselling brand — a memory-foam half-cylinder that props the knees to relieve the lower back.
→ Back sleepers wanting a trusted-brand bolster
VS·HEAD-TO-HEAD
Everlasting Comfort Under-Knee Pillow vs 5 STARS UNITED Half-Moon Knee Pillow
The low half-moon bolster — a subtler under-knee lift for back sleepers who find full bolsters too tall, at a friendly price.
→ Back sleepers who want gentle, low lift
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Frequently asked questions
Everlasting Comfort vs 5 STARS UNITED?
Both are under-knee bolsters for back sleepers. Everlasting Comfort is a taller half-cylinder rated 4.5 stars; the 5 STARS UNITED is a lower half-moon for gentler lift. More lift + top rating: Everlasting Comfort. Lower, subtler support: 5 STARS UNITED.
Everlasting Comfort vs ComfiLife bolster?
Very similar back-sleeper bolsters. Everlasting Comfort edges ahead on rating (4.5) and a cool-touch cover; the ComfiLife bolster is a close alternative from the category's bestselling brand. Both do the same lumbar-relief job.
Can side sleepers use it?
Not really — under-knee bolsters are shaped for lying on your back. Side sleepers should choose a between-the-knees contour like ComfiLife or Contour Legacy.
Does it help lower-back pain?
For many back sleepers, yes — bending the knees over a bolster reduces the lumbar arch and the muscular tension that comes with lying flat. It eases posture-related ache; see a doctor for an actual back injury.
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