White memory foam knee pillow on a made double bed in a bright bedroom (AI-generated image)
Memory foam
23 x 20 x 16 cm
Zipped cover

Knee Pillow

Knee pillow for side sleepers

A memory foam leg pillow that sits between your knees.

A small memory foam pillow shaped to sit between your knees while you sleep on your side, so your top leg rests on it instead of on the other knee. Strap free, with a zipped cover that comes off for the wash.

  • Zipped cover, machine washable
  • Memory foam, strap free
  • Between knees, calves or ankles
  • About 23 x 20 x 16 cm, as listed
1 Knee Pillow
White · memory foam
£17.99
Tracked UK mainland delivery, 3-8 working daysFREE
90 nights to try it at homeINCLUDED
Zipped washable coverINCLUDED
Want bump and back support too? See our pregnancy pillows

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THE TRIAL, STEP BY STEP

How the 90-night trial works

  1. 1Sleep on it for up to 90 nights.
  2. 2Not right? Email us, we reply within one working day.
  3. 3Send it back (you cover return postage).
  4. 4Full refund to your card, no questions.
What is a knee pillow?

A knee pillow is a small cushion you hold between your knees when you sleep on your side, so your knees do not press on each other and your top leg does not drop forward. This one is memory foam, about 23 x 20 x 16 cm, with a zipped washable cover, at £17.99.

Knee Pillow£17.99
✓ Free UK mainland delivery · 90-night trial
Memory foam · Strap free · Zipped washable cover · Ships from the UK · 90 nights to change your mind · Free UK mainland delivery · Memory foam · Strap free · Zipped washable cover · Ships from the UK · 90 nights to change your mind · Free UK mainland delivery ·
Product details

A knee pillow, kept simple

Foam between your knees and a cover you can wash. That is the whole idea.

1

Knees apartYour top leg rests on the foam, not on your other knee.

2

A cover that comes offZipped, breathable, listed as machine washable.

3

Ships from the UKSent from a UK warehouse.

4

Strap freeNothing round your leg, so you can turn over.

Free UK delivery · 90-night trial
The numbers

Size, fill and fabric facts

Size
23 x 20 x 16 cm in the listing text, 25 x 20 x 16 cm on the seller's size picture
Colour
White
Weight
Not published by the manufacturer
Shape
Contoured, with a 9 cm dip in the middle
Filling
Memory foam, as listed by the seller
Cover
Breathable fabric, removable with a zip, as listed by the seller
Ships from
United Kingdom
Care
Cover machine washable; foam not washable
Use
Between knees, calves or ankles when you lie on your side

The Knee Pillow is a comfort product. It is not a medical device, not a medical device. If pain persists or worries you, your midwife or GP should hear about it first.

We check our sleep claims against NHS pregnancy sleep guidance and the Tommy’s Sleep On Side campaign. Last reviewed 11 August 2026.

Free UK delivery · 90-night trial

Compare the shapes

Not sure which pillow you need? Our buying guide compares every shape.

The Bump WingThe Bump Wing£14.99The Full Body UThe Full Body U£23.49The Body BolsterThe Body Bolster£12.49The Bump LoungerThe Bump Lounger£54.49
In writing

Three promises on every Knee Pillow

The £17.99 pillow gets the same treatment as everything else we sell.

Ninety nights of proof

Use it every day for three months if you like. Not sleeping better? One email and the £17.99 comes straight back.You cover return postage.

Free tracked delivery

Tracked postage, nothing to pay for delivery, usually 3 to 8 working days to your door. No minimum spend.

A person, not a bot

Question about the fill, the wash, a return? A real human reads your message and replies within one working day.

Review access is limited to people who genuinely ordered this pillow. Nobody else gets to rate it.

Use it for a whole season, then judge it.

Photos cannot tell you how a pillow holds you. Nights can. So the Knee Pillow comes with 90 of them. If it has not earned its place by the end, return it for every penny.You cover return postage.

1Use the Knee Pillow for up to 90 nights
2Not convinced? Tell us in one email
3Your £17.99 is refunded in full
Start my 90 nights · £17.99
90nightsbetter sleep trial
Ask away

Knee pillow questions, answered

How big is it?
The seller gives 23 x 20 x 16 cm in the listing text and 25 x 20 x 16 cm on its size picture, with a 9 cm dip in the middle for your legs. It is a small pillow that sits between your knees, not a full body pillow.
Is it the same as a pregnancy pillow?
No. It only keeps your knees apart while you lie on your side. A full pregnancy pillow also holds your bump and back. If you want all three, look at our pregnancy pillows.
Why does it look flat when it arrives?
It is vacuum rolled for posting. The seller says it takes up to 72 hours to recover its full shape once unpacked.
Can I wash it?
The cover can. It comes off with a zip and the seller lists it as machine washable. The memory foam inside is not washable.
Does it have a strap?
No. It is strap free, so nothing goes round your leg.
How does returning it work?
You have 90 nights from delivery. Email us, send it back, and the £17.99 is refunded in full. Return postage is the only cost that stays with you. The steps are on our returns page.

Side sleeping, knees apart

A memory foam knee pillow for £17.99. Ninety nights to prove itself.

Get the Knee Pillow · £17.99
Secure checkoutDelivery included90 nights to change your mind

Your first night with the Knee Pillow

Three small tips. That is genuinely all there is.
1

Unpack it early in the dayIf it arrives compressed, give it a good shake and a little time to recover their full shape.

2

Let it open firstIt arrives rolled; give it up to 72 hours to recover its shape.

3

Knees in the dipLie on your side and rest your top knee in the dip, the narrow end towards your feet.

New pillows feel strange for a night or two. You have 90 of them to decide properly.