KNEE PILLOWS·EVERLASTING COMFORT
Everlasting Comfort Under-Knee Pillow
4.5 · 5,683 reviews
Editor score8.3/10
Best for: Back sleepers with lower-back pain
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 across 3 retailers
Prices checked 2026-07-04Prices shown were last checked on 2026-07-04and can change at any time — the price on the retailer's site at checkout is the one that applies. 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 lowest price we found at our last check (2026-07-04) and the manufacturer's list price for comparison. Retail prices — Amazon's especially — move constantly, so treat these as a guide: the price shown on the retailer's own page at checkout is the one that applies. Tap through to see each retailer's current price.
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
At a glance
SleeperBack sleepers
ShapeUnder-knee bolster
FillMemory foam
StrapNo
CoverCool-touch, washable
Best forLower-back relief
RelievesLumbar / post-surgery
Rating4.5 stars
Price~$28
How it scores
How our 8.3/10 breaks down — rated on the dimensions that matter most for knee pillows, from hands-on testing and verified specs, not the marketing.
Alignment support
8/10
Comfort
8.5/10
Breathability
7.5/10
Durability
8/10
Value
8.5/10
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
Decision support · what no other comparison site has
Take the quiz · 60 secNot sure which one is right for you?
Our 60-second sleep score quiz asks 8 questions and recommends the right sleep gear for your goals. Built by sleep engineers. Free, no signup.
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.
Affiliate disclosure: SleepyHero earns a small commission when you buy through these links. It doesn't cost you extra. Reviews and rankings are editorial — we don't accept payment for placement.