A knee pillow sits between your knees or under them when you sleep on your side or back. It keeps your legs apart and your hips and knees in a comfortable position. Shapes vary: wedge, heart and H-shapes each fit the legs differently, and some have a strap that keeps them in place.
The six pillows below are memory foam or fiber-filled leg pillows. Shapes, sizes and fills come from each product’s listing page. We have not used these pillows ourselves, and we make no health claims; the listings include medical-benefit wording that we leave out. If you have hip, knee or back concerns, ask a healthcare professional.
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What to Look For
| Feature | Why it matters |
|---|---|
| Shape | Wedge, heart and H-shapes fit differently between the knees |
| Size | A longer pillow supports more of the thigh |
| Strap | A strap helps the pillow stay put when you turn |
| Cover | A washable cover keeps it fresh |
Specs at a Glance
| Pillow | Shape and size | Fill | Notes |
|---|---|---|---|
| 5 STARS UNITED | Wedge; standard | Memory foam | No strap included; the blue band in the image is only a visual |
| Everlasting Comfort | H-shape; standard | High-density memory foam | Supports both legs and knees |
| 13 inch extended | 13 x 9 x 5 in; dual-concave | Memory foam; polyester cover | Full thigh length; cooling cover |
| With adjustable strap | Heart shape | Memory foam | Strap with extension to hold the pillow |
| Vertdens | Heart shape; 0.46 kg | Memory foam | Described as a leg positioner |
| MINUPWELL | Rectangular; 3 in | Polyester fill; cotton shell | Baffle box construction; for between legs or under knees |
The 6 Best Knee Pillows
1. 5 STARS UNITED Knee Pillow, Wedge
A wedge-shaped memory foam pillow for side sleepers and pregnant women according to the listing. The product does not include a strap.
Suits: a simple wedge between the knees. Strengths: a defined wedge shape. Weaknesses: no strap. Skip it if you move around a lot at night.
View 5 STARS UNITED Knee Pillow for Side Sleepers Memory Foam Leg Cushion on Amazon
2. Everlasting Comfort Memory Foam Knee Pillow
An H-shaped pillow of high-density memory foam that supports both legs, knees and hips and is larger than small cushions that tend to shift.
Suits: a pillow that spans both legs. Strengths: an H-shape that stays between the legs. Weaknesses: bulkier. Skip it if you want a small pillow.
View Everlasting Comfort Memory Foam Knee Pillow for Side Sleepers on Amazon
3. 13 Inch Extended-Length Knee Pillow
A 13 by 9 by 5 inch pillow with a dual-concave shape for full thigh support, made of memory foam in a polyester cover that the listing says stays cool.
Suits: longer thighs. Strengths: an extended length. Weaknesses: an unknown brand. Skip it if you want a name brand.
View 13 Inch Extended-Length Knee Pillow for Side Sleepers with Full Thigh Support on Amazon
4. Memory Foam Knee Pillow With Adjustable Strap
A heart-shaped memory foam pillow with an adjustable strap and extension that holds the pillow on your leg so it stays between your knees.
Suits: restless sleepers. Strengths: a strap. Weaknesses: a strap can feel fussy. Skip it if you dislike straps.
View Memory Foam Knee Pillow for Side Sleepers with Adjustable Strap Between Legs on Amazon
5. Vertdens Leg Pillow, Heart Shape
A 0.46 kilogram heart-shaped memory foam leg pillow described as a leg positioner.
Suits: a light, simple heart shape. Strengths: a low weight. Weaknesses: few details in the part we read. Skip it if you need dimensions.
View Vertdens Leg Pillow Knee Pillow for Side Sleepers Heart Shape on Amazon
6. MINUPWELL Knee Pillow, Between Leg and Under Knee
A 3 inch rectangular pillow with a 100 percent cotton shell and a baffle box construction that keeps its fill in place, for use between the legs or under the knees.
Suits: back and side sleepers who want a soft pillow. Strengths: a cotton shell and two uses. Weaknesses: fiber, not foam. Skip it if you want firm foam.
View MINUPWELL Knee Pillow for Side Sleepers Between Leg and Under Knee Pillow on Amazon
Care Tips
- Wash covers as labeled.
- Air memory foam before first use.
- Check strap fit so it does not restrict you.
- Replace a pillow that no longer holds its shape.
Mistakes to Avoid
- Choosing a pillow too wide for your knees.
- Using a strap too tightly.
- Relying on a pillow instead of medical advice.
- Skipping a size check.
Knee Pillow FAQ
Wedge or heart shape?
Wedge pillows are simple. Heart shapes cradle the knees. Try one and compare.
Will it stay in place?
A strap or an H shape helps.
The Short Version
For a simple wedge, the 5 STARS UNITED. For an H-shape, the Everlasting Comfort. For full thigh length, the 13 inch pillow. For a strap, the memory foam knee pillow with strap. For a light heart shape, the Vertdens. For a soft cotton-shell pillow, the MINUPWELL.
