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BRAIN SLEEP WEAR THERMO CONTROL
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Care & Instructions +
- Reshape the garment and lay flat to dry.
- Due to the characteristics of the fabric, color transfer may occur when subjected to strong friction or friction while wet.
- Wash separately from white or light-colored items.
- Due to the nature of the fabric, pilling may occur from friction during wear. Avoid continuous wear, and if pilling occurs, remove with a fabric shaver.
- When ironing, use a pressing cloth.
Materials +
Rib: 90% Cotton, 10% Polyurethane
Sizes +
①Body Length ②Body Width ③Yoke Length
S: ①approx. 66 cm ②approx. 56 cm ③approx. 86 cm
M: ①approx. 68 cm ②approx. 59 cm ③approx. 87 cm
L: ①approx. 71 cm ②approx. 62 cm ③approx. 88 cm
XL: ①approx. 74 cm ②approx. 65 cm ③approx. 89 cm
■Pants
①Waist ②Hip ③Rise ④Inseam
S: ①approx. 33 cm ②approx. 100 cm ③approx. 29 cm ④approx. 68.5 cm
M: ①approx. 36 cm ②approx. 106 cm ③approx. 30 cm ④approx. 70 cm
L: ①approx. 39 cm ②approx. 112 cm ③approx. 31 cm ④approx. 71.5 cm
XL: ①approx. 42 cm ②approx. 118 cm ③approx. 32 cm ④approx. 73 cm
Thermo-regulating sleepwear
that adapts to temperature changes
during sleep
Cool when it’s hot,
warm when it’s cold,
with thermo-regulating comfort
Thermo-regulating sleepwear powered by space technology.
A new, innovative approach to temperature control is introduced.
With total support exceeding ¥52 million on the crowdfunding platform Makuake —
following the all-season comforter that guides the in-bed environment
toward an ideal temperature
Temperature fluctuations
during sleep can reach up to 7.1°C
Even while sleeping, temperature differences of up to 7.1°C can occur in urban environments.
Based on the highest and lowest outdoor temperatures in October between 10:00 p.m. and 8:00 a.m. (Tokyo).
Highest temperature: 20.8°C / Lowest temperature: 13.7°C
Temperature difference: 7.1°C
Source: Japan Meteorological Agency. Average daily and hourly temperature data over the past 30 years (1991–2020).
Sleep problems caused by
temperature fluctuations
- Struggling to fall asleep smoothly due to an inability
to adapt to temperature changes… - Waking easily during the night
as the in-bed environment becomes unbalanced… - Kicking off the comforter during sleep
due to heat and humidity…
What matters most is
controlling temperature
to achieve high-quality sleep.
to guide the body
toward high-quality sleep.
Regulating temperature fluctuations
to guide the body toward high-quality sleep.
TECHNOLOGY
01THERMO CONTROL
Cool when it’s hot,
warm when it’s cold
Self-regulating temperature control powered by space technology
Outlast technology was originally developed for space suits.
It is an innovative temperature-regulating material in which microcapsules measuring 20–30 microns in diameter are embedded within the fibers.
Approaching a skin surface temperature
that feels comfortable to the human body: 32°C ±1
Whether it is hot or cold, Outlast’s temperature-regulating technology responds to changes in temperature as the microcapsules shift between solid and liquid states.
By absorbing, storing, and releasing heat, it guides the skin surface temperature toward a comfortable range of 32°C ±1.
Approximately 5°C of comfort temperature regulation
Compared to cotton fleece fabric, temperature is regulated by an additional approximately 5°C, helping reduce the impact of changes in room temperature to the greatest extent possible.
Absorbs heat when it’s hot and releases heat when it’s cold to regulate temperature.
Outlast gel transitioning from solid to liquid. Temperature is regulated through this phase change.
Heat
Cold
Cold
Hot
Outlast gel transitioning from solid to liquid. Temperature is regulated through this phase change.
02RELAX & COMFORT
Designed to be gentle on the skin while enhancing comfort
Gentle on the skin,
with a smooth, proprietary fabric
This proprietary fabric blends absorbent cotton with highly moisture-absorbing rayon, interwoven with durable, quick-drying polyester.
Finished as a soft, skin-friendly pile fabric that resists wrinkling, it offers the comfortable feel of sweatshirt material.
Suitable for spring, autumn, and winter; it can also be worn in summer when using air conditioning.
Lightweight fabric that supports sleep
6.The 6.8-ounce lightweight sweatshirt fabric delivers thermo-regulating performance while reducing the burden of turning over during sleep, supporting comfortable, all-season rest.
※Typical sweatshirt fabrics weigh between 9 and 13 ounces.
Reduces uncomfortable clamminess during sleep
Using a fabric with moisture absorption and release performance exceeding 200% of that of conventional fleece fabrics, it helps regulate humidity within the in-bed environment.
Details designed for year-round comfort
The top features finger openings, allowing the sleeves to extend over the hands when temperatures feel slightly cool.
The pants are designed with an adjustable stopper, making it easy to modify the hem length when the weather feels warmer.
Freedom of movement for more comfortable sleep
Designed to avoid restricting the body, this silhouette maintains a comfortable range of motion so as not to interfere with relaxation before sleep or the natural turning over needed during the night.
The underarm area of the top and the hip area of the pants are constructed three-dimensionally, with generously sized armholes. Elastic and ribbing are minimized to avoid excessive tightness, helping reduce stress caused by constriction during sleep.
03SUPER CLEAN
Antibacterial and deodorizing
for everyday cleanliness
Designed for everyday wear,
antibacterial and deodorizing performance matters
An antibacterial and deodorizing treatment using environmentally considerate silver ions (AG+) is applied to the fabric.
It helps prevent unpleasant perspiration odors during sleep and is also effective against indoor drying odors.
The effect has been shown to remain even after approximately 100 washes.
※Machine washable, including drum-type washers. Do not tumble dry.
SPECSpecifications
COLOR
Available in 2 colors: black and charcoal gray
UNISEX SIZE
A unisex size designed to fit all genders, ages, and body types.
◾️Size Guide (Unisex)
◾️ Product Measurements
◾️Materials
Main fabric: Cotton 34% / Rayon 33% / Polyester 30% / Polyurethane 3%
Rib: Cotton 90% / Polyurethane 10%
Product comparison chart
FAQFrequently asked questions
Can it be washed?
Yes, it is machine washable. Please place it in a laundry net and wash on a gentle cycle. It is also compatible with drum-type washing machines. The fabric is treated with antibacterial and deodorizing silver ion (AG+) technology, and this treatment has been shown to remain effective after approximately 100 washes.
Can it be tumble dried?
No, please avoid using a tumble dryer. After washing, please hang to dry naturally in the shade.
What colors are available?
It comes in three colors: Black, Charcoal Gray, and Ivory.
How thick is the fabric?
6.It uses a lightweight 6.8-ounce sweatshirt fabric. Compared to standard sweatshirt fabrics (9–13 ounces), it is thinner and lighter, which also helps reduce the burden of turning over during sleep.
Can it be ironed?
Please avoid using an iron on this garment.
Which seasons can it be used in?
It can be used all year round. Thanks to Outlast technology, it automatically regulates temperature — keeping you cool when it's hot and warm when it's cold. It is suitable not only for spring, autumn, and winter, but also for summer when sleeping with the air conditioning on.
Does it feel stuffy during sleep?
The fabric features high moisture absorption and release performance, which helps eliminate uncomfortable clamminess during sleep and regulates humidity within the in-bed environment.
How should I choose my size?
The garment comes in unisex sizes (S / M / L / XL). Please refer to the size guide (height, chest circumference, and waist measurements) to find your best fit. The overall fit is designed to be relaxed and roomy.