BRAIN SLEEP HARAMAKI RECOVERY
眠りながら、体のコアからリカバリー。温熱×着圧の腹巻き。
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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
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).
What matters most is
controlling temperature
to achieve high-quality sleep.
Regulating temperature fluctuations
to guide the body toward high-quality sleep.

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.
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.

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.

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.

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.

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.


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.



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.



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.

Available in 2 colors: black and charcoal gray
A unisex size designed to fit all genders, ages, and body types.
Main fabric: Cotton 34% / Rayon 33% / Polyester 30% / Polyurethane 3%
Rib: Cotton 90% / Polyurethane 10%

Made with a luxurious polyester twill fabric.
The packaging features a unified beige tone with matching ribbon, and the Brain Sleep logo is placed with a refined, elegant sizing.
The wide, lavish ribbon creates a premium, sophisticated feel that is perfectly suited for gifting.
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.
No, please avoid using a tumble dryer. After washing, please hang to dry naturally in the shade.
It comes in three colors: Black, Charcoal Gray, and Ivory.
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.
Please avoid using an iron on this garment.
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.
The fabric features high moisture absorption and release performance, which helps eliminate uncomfortable clamminess during sleep and regulates humidity within the in-bed environment.
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.