1 / 7Rinkai-S HDZ Adjustable Butterfly Memory Foam Pillow
Adjustable: The Rinkai-S HDZ is a butterfly-shaped memory foam pillow with a removable insert and reversible orientation for changing its height. It is presented for side, back, and stomach sleeping, though comfort is personal and customer feedback is mixed.
At a glance
- Height options are described as changing by rotating the pillow 180 degrees or removing the 0.8-inch bottom insert.
- The contoured shape and armrest areas are intended to accommodate side, back, and stomach sleepers, as well as sitting up to read or scroll.
- The listing claims the foam is CertiPUR and OEKO-TEX certified and calls the pillowcase cooling.
Reference price: $32.98
Price checked: Nov 14, 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- Two adjustment methods offer a way to change the contour height without choosing a separate pillow.
- The listed butterfly shape and broad armrest areas are designed with multiple sleep positions in mind.
- The maker supplies a ventilation period for possible foam odor after unpacking.
Cons
- Comfort may not suit every sleeper. Customer feedback includes reports of both comfort and worsened discomfort.
Technical specifications
9 specifications| Brand | Rinkai-S |
|---|---|
| Model | HDZ |
| Form factor | Butterfly |
|---|---|
| Listed size | Full |
| Dimensions | 24.8 × 15.3 ×（5.7-4.9）inches |
| Fill material | Memory Foam |
|---|---|
| Material listed | 80%polyamide+20%wire-reinforced Fabric |
| Color | Dark Gray |
| Height adjustment insert thickness | 0.8 inches |
What to know before buying
- The maker says to air the pillow in a cool, ventilated place for 2-3 days after receipt if it has a slight smell. It also cautions that comfort varies with body type, sleep position, and neck curvature, and that dimensions may deviate by 0.5 to 1 inch.
Who is it for?
A good fit for
- Adults seeking a contoured memory foam pillow with adjustable height options.
- Sleepers who want a pillow designed for side, back, or stomach positions.
Less suited to
- Buyers seeking a guaranteed treatment for sleep apnea, snoring, or pain. These are listing claims, not demonstrated outcomes.
- Anyone who needs a known comfort fit before purchase, since reported comfort experiences vary.
Customer reviews on Amazon
- 5 stars
72% 72% - 4 stars
12% 12% - 3 stars
7% 7% - 2 stars
6% 6% - 1 star
3% 3%
Customer feedback describes the pillow as effective, but comfort reports are mixed, including some customers who say it worsened their discomfort. For buyers considering its contoured shape and adjustable height, that split matters because fit depends on personal comfort. The aggregate ratings lean positive overall, but do not explain why individual customers rated it as they did.
Positive themes
- Some customers describe the pillow as effective.
Negative themes
- Some customers say the pillow worsened their discomfort.
Mixed feedback
- Comfort receives mixed feedback, with some finding it comfortable and others reporting discomfort.
Frequently asked questions
How can the pillow height be adjusted?
The listing describes rotating it 180 degrees or removing the bottom insert, which it lists as 0.8 inches thick.
What sleep positions is it designed for?
The maker presents it for side, back, and stomach sleeping, and also mentions sitting up to read or scroll.
Does the listing establish that it treats sleep apnea or pain?
No. Sleep apnea, snoring, and pain relief appear as intended-use claims. The supplied information does not establish medical effectiveness.
Should I expect a smell when unpacking it?
The maker says memory foam may have a slight smell after sealed, high-temperature transport and advises airing the pillow for 2-3 days if needed.
Alternative options
VYLEE Cervical Neck Pillow for Pain Relief, Orthopedic Cooling Memory Foam | Ergonomic contour pillow supports proper neck alignment for side, back & stomach sleepers with cooling washable cover
$39.99
Cervical Neck Pillow for Sleeping, Pain Relief, Ergonomic Memory Foam Pillows for S...
$62.99
Cervical Neck Pillow for Sleeping, Pain Relief, Ergonomic Memory Foam Pillows for S...
$59.39
Ergonomic Cervical Memory Foam Pillow for Sleep Apnea Neck Support | Ergonomic Cerv...
$31.67
Cooling Pillows Queen Size Set of 2, Memory Foam Bed Pillows for Sleeping, Ergonomi...
$35.98
Cervical Neck Pillow for Sleeping, Pain Relief, Ergonomic Memory Foam Pillows for S...
$68.39
Sleep Doctor Approved Cervical Neck Pillow for Sleeping, Ergonomic Contour Side Sleeper Pillows for Adults, Cooling Orthopedic Pillow for Pain Relief Support, Memory Foam Pillows Back Stomach Sleepers
$35.99
32" King Contour Memory Foam Pillow for Neck Pain Relief, White | Orthopedic neck s...
$59.99
3 in1 Neck Massager Pillow with Heat, Cervical Neck Pillow for Pain Relief | Ergono...
$62.99
Cervical Pillow for Neck & Shoulder Pain Relief Sleeping | Memory Foam Bed Pillow B...
$29.69
Derila Ergo Cervical Neck Pillow for Sleeping Pillow Contour Memory Foam Pillows for Back, Side Sleeper Pillows 21.25 x 14.17 x 4.72 inches
$54.99
Ergonomic Cervical Neck Pillow, High-Density Memory Foam,Gray& White | For Side, Ba...
$79.99
