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BRAIN SLEEP COMFORTER ALL SEASONS
BRAIN SLEEP COMFORTER ALL SEASONS
2298 in stock
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Care & Instructions +
- Color transfer may occur, so do not leave the product wet for extended periods.
- If the product does not fit in a household washing machine, consider using a large-capacity coin laundry or consult a professional cleaning service.
Materials +
One side: 100% Polyester
One side: 100% Nylon
■Filling
50% Rayon, 50% Polyester
(Single 0.5kg, Semi-double 0.56kg, Double 0.63kg, Queen 0.7kg)
Sizes +
Semi-double: approx. W170 × L210 cm
Double: approx. W190 × L210 cm
Queen: approx. W210 × L210 cm
ALL SEASONS
Guide you to a comfortable
temperature year-round.
An automatically temperature-regulating comforter
incorporating space technology
Cool when hot,
warm when cold.
Incorporates an innovative temperature-regulating material
developed for space suits.
OUTLAST TECHNOLOGY
Filled with Outlast, an innovative temperature-regulating material
developed for space suits operating in extreme space environments
with temperature differences said to reach tens of degrees Celsius.
Leading the sleeping environment
toward an ideal in-bed temperature.
One layer for spring, summer, and fall,
and as an inner layer in winter.
Automatic temperature regulation
that supports a comfortable sleep environment
STORY
No more second-guessing
your bedding choices.
Automatic temperature regulation
that leads to all-season comfort.
Comfortable sleep
amid complex temperature changes
Japan’s seasonal temperature extremes
are among the most severe in the world
Japan has a uniquely humid temperate climate rare worldwide.
Temperature differences between summer and winter are large, and the transitions between seasons—spring, the rainy season, and fall—overlap, making temperature changes throughout the year increasingly complex.
Fatigue caused by extreme temperature fluctuations accumulates day by day.
Just as clothing helps regulate body temperature during the day, it is essential to regulate the in-bed climate through bedding during sleep.
"Automatic temperature regulation"
is essential for comfort
Resilient against
extreme temperature
differences
ALL SEASONS COMFORTER
Surpassed the target goal through
crowdfunding platform Makuake
3 FEATURES
COMFORTABLE
No cover required
Always lightweight and compact
Simple and compact for storage
TECHNOLOGY
- Technology details -
01
ALL SEASON
COMFORTABLE
A design considered for comfortable sleep, 365 days a year
Cool when hot,
warm when cold
Automatic temperature regulation incorporating space technology
OUTLAST TECHNOLOGY
An innovative temperature-regulating material developed for space suits
Outlast, a material originally developed for space suits, guides the sleep environment toward an ideal temperature range.
Outlast incorporates microcapsules measuring approximately 20 to 30 microns in diameter, embedded within the fibers as a temperature-regulating material. This Outlast material is used in the insulation.
Temperature-regulating technology 1
Absorbs heat when it is hot
Releases heat when it is cold
Guides the sleep environment toward an ideal temperature range throughout the year
Temperature-regulating technology 2
Outlast responds to temperature changes as the microcapsules themselves shift between solid and liquid states.
Through this repeated phase change, heat is absorbed, stored, and released, guiding the environment toward a comfortable temperature range.
※The video shows Outlast gel placed on a heating plate at 36°C, illustrating the phase change of the capsules as they shift between solid and liquid states.
Through this phase change, heat is absorbed and temperature regulation occurs.
Reliable temperature regulation
Responsive even under extreme temperature changes
The graph compares the maximum temperature differences observed when the ambient temperature was changed between 10°C and 40°C.
While the cotton comforter shows a temperature difference of 15°C or more, Outlast maintains a difference of just 4°C.
This indicates stable temperature regulation with minimal influence from changes in ambient temperature.
Reliable humidity regulation
toward a comfortable sleep environment
The sleep environment requires not only temperature regulation but also humidity regulation.
With general polyester-filled comforters, humidity gradually increases over time.
In contrast, Outlast maintains a stable and comfortable humidity range.
02
REVERSIBLE
Use either side depending on the season
No cover required
A reversible construction
for comfort, 365 days a year
Switch between the front and back surfaces according to the season.
During warmer months, the smooth fabric with a cool-to-the-touch feel rests against the skin. In colder seasons, the soft and gentle peach-skin fabric wraps the body comfortably.
Designed to be used without a cover.
WARM and COOL indicators are shown on the product to serve as a reference when selecting each side.
Superior cool-to-the-touch feel for comfort even during hot summer nights
The fabric delivers a cool-to-the-touch feel that exceeds typical cotton and standard benchmarks based on qmax values.
During hot summer conditions, the COOL side can be positioned against the skin to support a more comfortable sleep environment.
Thoughtful details that reduce clinginess against the skin
Quilting is a key element of a comforter, and this design adopts a 70-square quilt pattern—more than twice the density typically used.
Compared with larger, conventional quilting, the finer pattern creates a subtle lift from the skin, reducing unwanted clinginess around the body.
The result is a towel-like feel that remains comfortable from early spring through summer.
Sleep at
the right temperature
for all seasons
One comforter for spring, summer, and autumn
Used as an inner layer in winter to guide the sleep environment toward an ideal temperature
Recommended usage
Depending on the room temperature at the time, the product can also be used in combination with other bedding.
Depending on the room temperature at the time, the product can also be used in combination with other bedding.
03
CLEAN & COMPACT
Always clean
Always lightweight and compact
Easy to wash,
easy to keep clean every day
The product is machine-washable at home, allowing it to be used directly without a cover.
It can be washed easily at any time, helping maintain a clean sleeping environment.
Designed for everyday use, all year round
Always on the bed
When storage is needed, the included storage bag allows the product to be packed compactly and carried with ease.
※ Images of the storage bag are for illustrative purposes.
Materials and labeling may vary depending on the production period.
Comfortable sleep
for all seasons
Choosing bedding
no longer needs
to be complicated.
SPEC
- Specifications -
■ Size
・Single size: W150 cm × L210 cm
・Semi-double size: W170 cm × L210 cm
・Double size: W190 cm × L210 cm
・Queen size: W210 cm × L210 cm
■ Color
cosmic blue, light gray
■ Product weight
・Single size: approx. 1260 g
・Semi-double size: approx. 1430 g
・Double size: approx. 1600 g
・Queen size: approx. 1740 g
■ Materials
Side fabric: one side 100% polyester, one Side 100% nylon
Filling: 50% rayon, 50% polyester
(single 0.5 kg, semi-double 0.56 kg, double 0.63 kg, queen 0.7 kg)
FAQ
- Frequently asked questions -
Find a Store
You can also purchase this product at our retail stores. Product availability varies by location. For more details, please check here.
Is it machine washable?
A. Yes. The product can be machine-washed in a household washing machine.
Using a laundry net and washing it separately is recommended.
Can I tumble dry?
Do not tumble dry. Line drying in the shade is recommended.
Can I use a futon dryer?
Yes, a futon dryer can be used.
Do not use the dryer near a BRAIN SLEEP MATTRESS or close to a BRAIN SLEEP PILLOW as it may cause changes to the product’s shape.
What color options are available?
The product is available in a two-tone combination of cosmic blue and light gray.
Is there a specialized duvet cover available?
A specialized cover is required.
The product can be machine-washed in a household washing machine and features a reversible design, allowing it to be used without a cover.
There are no ties for securing a cover.
Which seasons is the product suitable for?
In spring and autumn, the product can be used on its own with the WARM side facing the body.
In summer, the COOL side can be used on its own.
In winter, the WARM side can be used as an inner layer under a heavier duvet.
Depending on the ambient temperature, the product can be used alone or in combination with other bedding.