Side sleeping can put one knee directly on the other and leave your top leg pulling your hip forward. A pillow between your legs may make that position more comfortable, but the right shape depends on where you need support.
These 10 picks cover compact knee cushions, longer thigh separators, cooling options, and designs with straps. Use the guide below to narrow down the fit and features that matter most to you.
Best 10 Hip Pillow for Side Sleepers Picks for 2026
Versatile Positioning
5 STARS UNITED Gray Knee Pillow
- Soft contoured memory foam
- Washable, breathable cover
- No securing strap included
Best For: Side and back sleepers seeking flexible positioning
Cooling Gel Option
Contour Legacy Cool Leg Pillow
- Supports legs and knees
- Gel foam with breathable mesh
- Strap-free crescent shape
Best For: Side sleepers prioritizing cooling features
White Multiposition Pick
5 STARS UNITED White Knee Pillow
- Four suggested placements
- Washable, breathable cover
- No securing strap included
Best For: Side and back sleepers who prefer a white cushion
Ventilated Foam Pick
Contour Legacy Original Leg Pillow
- Cushions legs and knees
- Ventilated memory foam
- Strap-free curved design
Best For: Side sleepers seeking airflow without a gel layer
Sleep Kit Pick
- Leg strap helps hold position
- Washable zippered cover
- Sleep mask and ear plugs included
Best For: Side sleepers seeking a strapped spacer and sleep accessories
Contoured Support Pick
Everlasting Comfort Knee Pillow
- Cradles both legs
- Optional removable strap
- Machine-washable cover
Best For: Side sleepers wanting contoured knee separation
Full-Thigh Pick
- Covers thighs and knees
- Stated 3-inch separation
- Washable removable pillowcase
Best For: Side sleepers seeking a longer, strap-free leg spacer
Breathable Pick
Vaunn Medical Cloud Air Knee Pillow
- I-shaped memory-foam support
- Breathable fabric cover
- Removable, machine-washable cover
Best For: Warm side sleepers who prioritize easy cover care
Best Heavy-Duty Pick
- Cooling-gel layer
- Contoured memory-foam cushioning
- Works between knees or shins
Best For: Side sleepers seeking a cooling-gel knee pillow
Secure-Fit Pick
BlissTrends Large Knee & Leg Pillow
- H-shaped contoured fit
- High-density memory foam
- Removable, washable cover
Best For: Side sleepers wanting a defined between-the-knees fit
Versatile Positioning – 5 STARS UNITED Gray Knee Pillow
If you’re shopping for a hip pillow for side sleepers, this gray memory-foam cushion sits between your knees to help keep your legs separated and your hips more comfortably positioned. Its contoured shape also works beneath a leg, between the calves, or under the knees when lying on your back.
Best For: Side sleepers who want a soft, multiposition knee pillow with a washable cover.
Pros:
- Contoured memory foam supports the knees, legs, and thighs.
- Removable, breathable, anti-pill cover is machine washable.
- ACA-endorsed; notes list OEKO-TEX STANDARD 100 and CertiPUR certifications.
Cons:
- No strap is included, despite the blue band shown in the main image.
- Foam core cannot be washed; the cover must air-dry.
This is a flexible choice if you switch between side and back sleeping. If a securing strap is essential, look elsewhere.
The Contour Legacy Cool is a hip pillow for side sleepers who prefer support along both their knees and legs rather than a small cushion between the knees alone. Its crescent-shaped gel memory foam and breathable 3D mesh cover are designed for a cooler feel.
Best For: Side sleepers who want leg-and-knee support with a cooling-focused cover and foam.
Pros:
- Shape cushions both the legs and knees.
- Gel-layer memory foam and breathable mesh promote a cooler feel.
- Strap-free design lets you move without fastening the pillow to your legs.
Cons:
- One pillow may not provide full-leg support; the product notes suggest using two for that purpose.
- Strap-free fit may not suit shoppers who want a pillow attached to one leg.
Choose this version if cooling features matter more to you than the ventilated-foam construction of the original Contour Legacy below.
This white hip pillow for side sleepers uses contoured memory foam to separate the knees and support a more comfortable sleeping position. It can also sit between the calves, beneath a leg, or under the knees for back sleeping.
Best For: Shoppers who want a white, soft-feel knee cushion they can reposition for side or back sleeping.
Pros:
- Multiple placement options make it useful beyond between-knee support.
- Removable, breathable, anti-pill cover is machine washable.
- ACA-endorsed; notes list OEKO-TEX STANDARD 100 and CertiPUR certifications.
Cons:
- Does not include a strap; the pictured blue band is a marketing element.
- Foam core is not washable, and the cover requires air-drying.
Its practical features closely match the gray 5 STARS UNITED option above, so the white color may be the deciding factor between them.
The original Contour Legacy is a hip pillow for side sleepers who want cushioning at both the knees and legs. Its curved, strap-free shape allows movement, while ventilation holes in the memory foam are designed to improve airflow.
Best For: Side sleepers seeking a soft leg-and-knee pillow with ventilated foam.
Pros:
- Supports both legs and knees rather than only separating the knees.
- Ventilated memory foam promotes air circulation.
- Strap-free crescent shape permits movement during sleep.
Cons:
- No strap to keep it attached to a leg.
- Unlike the Cool version, its supplied notes do not list a gel layer or 3D mesh cover.
This is the Contour Legacy option to consider if you prefer ventilated memory foam over the Cool model’s gel-and-mesh construction.
Sleep Kit Pick – NATUMAX Strapped Knee Pillow
If you want a hip pillow for side sleepers that stays between your legs when you roll over, this NATUMAX memory foam pillow has a leg strap to help keep it positioned. Its butterfly shape can sit above or below the knees, and the set includes a sleep mask and ear plugs.
Best For: Side sleepers who want a strapped leg spacer and a bundled sleep kit.
Pros:
- Leg strap helps keep the pillow between your legs as you turn.
- Can be positioned above or below the knees.
- Breathable, zippered cover is machine washable.
- Includes a sleep mask and ear plugs.
Cons:
- Memory foam core must be spot-cleaned and air-dried, not machine-washed.
- At 9.45 inches long, it does not offer full-thigh coverage.
Choose this one if keeping a compact spacer in place matters more to you than supporting the length of your thighs.
Contoured Support Pick – Everlasting Comfort Knee Pillow
This hip pillow for side sleepers uses a dual-concave shape to cradle both legs and help keep the knees separated. Its high-density memory foam offers a supportive spacer, while a removable strap gives you the option to secure it during sleep.
Best For: Side sleepers who want contoured knee support with an optional strap.
Pros:
- Dual-concave design cradles both knees and legs.
- Removable strap helps limit shifting when you turn.
- High-density memory foam is designed to retain its shape.
- Breathable cover is removable and machine washable.
Cons:
- The contoured shape concentrates support around the knees rather than covering the full thighs.
- Only the cover is described as machine washable.
It is a practical choice if you prefer a shaped knee spacer and want to decide whether to use the strap each night.
Full-Thigh Pick – 14-Inch Long Knee Pillow
If a small knee cushion leaves your thighs unsupported, this longer hip pillow for side sleepers extends across the thighs and knees. Its 14-inch semicircular design uses memory foam and maintains a stated 3-inch thickness for leg separation.
Best For: Side sleepers who want thigh-and-knee coverage without a leg strap.
Pros:
- 14-inch length provides more coverage along the thighs and knees.
- Semicircular contour helps cradle the legs.
- Maintains a stated 3-inch thickness for consistent separation.
- Removable pillowcase can be washed by hand or machine.
Cons:
- No strap is specified to hold it in place when you turn.
- Only the pillowcase is washable; the foam core is not.
Its main advantage is coverage: consider it when you want one longer spacer instead of a compact pillow centered only between the knees.
Breathable Pick – Vaunn Medical Cloud Air Knee Pillow
If you’re shopping for a hip pillow for side sleepers and tend to get warm at night, the Vaunn Cloud Air pairs an I-shaped memory-foam cushion with a breathable fabric cover. It sits between your legs to help keep your hips and knees comfortably separated.
Best For: Side sleepers who want a breathable, easy-to-clean knee pillow.
Pros:
- I-shaped design fits between the legs for side-sleeping support.
- High-density memory foam is designed to retain its supportive shape.
- Breathable, removable cover is machine washable.
Cons:
- The pillow itself is not listed as machine washable; the removable cover is.
- Its 10-by-8-by-6-inch form may not suit shoppers seeking a longer leg pillow.
This is a practical choice if cover care and airflow matter as much to you as cushioning. Check the dimensions against where you prefer to position a pillow between your legs.
Best Heavy-Duty Pick – Large Grey Knee Pillow
This hip pillow for side sleepers combines a contoured memory-foam shape with a cooling-gel layer. At 10.6 by 7.9 by 5.5 inches, it is designed to cushion the space between your knees and can also be positioned between your shins.
Best For: Side sleepers who want a cooling-gel option with more than one positioning choice.
Pros:
- Cooling-gel layer offers a cool sensation.
- Memory foam conforms to the legs for cushioning.
- Can be used between the knees or shins, or for leg elevation.
Cons:
- The supplied details do not specify a removable or washable cover.
- The cooling sensation may be less relevant if you prefer a warmer sleep surface.
Its main distinction is the gel layer, while its alternative placements add flexibility. If easy laundering is a priority, confirm the care instructions before buying.
Secure-Fit Pick – BlissTrends Large Knee & Leg Pillow
The BlissTrends hip pillow for side sleepers uses an H-shaped profile and high-density memory foam to support the space between your knees. Its 10-by-7.9-by-5.7-inch size and contoured design aim to help it stay in position while you sleep.
Best For: Side sleepers who want a contoured fit and a removable, washable cover.
Pros:
- H-shaped contour is designed to fit between the legs without moving easily.
- High-density memory foam provides cushioned support.
- Zippered cover removes for washing.
Cons:
- Its fixed contour may be less versatile than a standard rectangular pillow.
- Some units sold within the manufacturer’s stated date range carried an incorrect registry number on the label.
Consider this one if a defined knee-to-knee fit appeals to you. BlissTrends states that the correct registry number is RI 16620 (CN), should you need to check the label.
How We Picked the Best Hip Pillow for Side Sleepers
We organized these 10 selected listings around practical differences: pillow length and shape, memory foam construction, cooling features, straps, and stated size options. Some listings appear closely related or repeated, so treat the roundup as a comparison of available choices rather than 10 necessarily distinct designs. Product descriptions alone cannot establish how much pain relief a pillow will provide; fit and comfort vary by person.
Quick Comparison: Which Shape Fits Your Sleep Style?
Compact contoured knee pillows sit between the knees and are easier to reposition when you roll over. The 5 STARS UNITED, Contour Legacy, Everlasting Comfort, and Vaunn listings fall into this general category. Long separators extend farther along the thighs and may suit sleepers who dislike their upper legs touching, though they take up more bed space. Cooling-feature options, including the Contour Legacy Cool and the grey gel listing, are worth considering if warmth between the knees bothers you. A strap-equipped option may be useful if your pillow tends to slip away overnight.
Key Buying Factors for a Hip Pillow for Side Sleepers
Thickness and Position
The pillow should keep your upper knee from dropping sharply toward the mattress without pushing your legs uncomfortably far apart. A thick cushion is not automatically better: your leg length, hip width, and mattress softness affect what feels neutral. If you want support above the knee as well, look at a longer design.
Foam Feel and Stability
Memory foam can provide a shaped resting place for the legs, but firmness and rebound differ between products. Check the listed dimensions and customer feedback for clues about whether a pillow compresses substantially under weight. Contours help locate your knees; a strap can help retain placement, but may feel restrictive if you change positions often.
Heat and Cleaning
Gel or cooling-oriented covers may feel more comfortable to warm sleepers, but neither guarantees a cool surface all night. Check whether the cover is removable and follow its care instructions. Also confirm the actual pillow dimensions and included accessories before buying, especially when listing names are similar.
Who Should Buy Which Hip Pillow for Side Sleepers?
Choose a compact knee pillow if you mainly want to prevent knee-on-knee contact and prefer a small cushion. Try a long thigh separator if contact higher up your legs is the bigger issue. Consider a strap-equipped pillow if you regularly wake up without the cushion in place, or a cooling-feature model if trapped heat is your main complaint. During pregnancy or when managing persistent hip, back, or sciatic pain, prioritize comfortable positioning and ask a healthcare professional for advice if symptoms continue or worsen. A pillow can support a sleep position; it is not a treatment for an underlying condition.