Recreating the neutral body posture proposed by NASA
Guiding the body toward ultimate relaxation

When the body is released in a weightless environment, the shoulders naturally settle inward and the legs rise slightly.
This posture is considered one of the least physically demanding positions for the human body.
Through its proprietary three-dimensional structure, the mattress creates a buoyant, floating-like rebound and adjusts firmness to the shoulders, lower back, and legs, guiding the body into ultimate relaxation—free from gravity.

Elevating the legs enhances circulation and supports recovery from fatigue

The leg section is designed to sit 4 cm higher than the chest, encouraging smoother blood flow back toward the upper body. This positioning helps ease feelings of fatigue and swelling.

Ultra pressure dispersion supports natural turning, helping the body rest with less energy

By maintaining proper sleeping posture, the mattress enables smooth, effortless turning during sleep.
Its nine-layer structure repeatedly absorbs and rebounds in sync with body movement, supporting each turn throughout the night.
By minimizing energy expenditure during sleep, it reduces physical strain and helps maintain comfort until morning.

Controls temperature and humidity for optimal sleep through super-breathable materials

To achieve quality sleep, maintaining proper temperature and humidity within the sleep environment is essential.
With over 90% of its structure composed of air layers, heat and moisture generated during sleep do not build up, creating a consistently comfortable sleeping environment.

Releases heat and moisture from perspiration, maintaining a comfortable sleep environment through the night

Made with exceptionally breathable materials, this product releases heat generated during sleep as well as moisture from perspiration, helping keep the bed microclimate comfortable throughout the night.

Test method: a subject lay on the mattress for 20 minutes while covered with a towel blanket at rest.
Thermal images were taken before use and after 20 minutes using thermography.

Washable with water for lasting cleanliness
Helps reduce dust mites and house dust

The cover can be removed and machine-washed, and the mattress itself is also fully washable.

The mattress can be rinsed clean in the shower, then simply air-dried in the shade—making maintenance easy and straightforward.

Typical urethane or coil mattresses tend to trap heat and moisture due to poor breathability, creating an environment where dust mites and mold are more likely to grow.
In contrast, the BRAIN SLEEP Mattress features excellent airflow, making it less prone to dust mites and mold. When house dust or dirt becomes a concern, the mattress can be washed at any time, helping maintain a consistently clean and hygienic sleep environment.

Exceptional durability equivalent to 10 years of use

Everyday use makes durability a key concern when choosing a mattress.
This product has demonstrated high durability through compression testing equivalent to 80,000 cycles, in accordance with JIS standards.
Even with long-term use, it continues to deliver stable comfort.
*Durability may vary depending on usage conditions.

MADE IN JAPAN
Meticulous craftsmanship,
trusted quality

Each mattress and pillow is carefully crafted, with skilled technicians and artisans conducting repeated quality checks by hand.
After passing rigorous inspections, each item is meticulously packaged and delivered with care.

Natural spring water with minimal impurities is used to prevent quality degradation

The production process uses natural spring water from Shimizu Bakuen, designated as one of Toyonokuni’s 15 Famous Waters—a special soft water with exceptionally low levels of impurities.
By using such pure water, unnecessary chemical reactions are avoided, helping to prevent any deterioration in quality.

Shoulder rest
gradation

Graduated firmness at the shoulder area

Comparison table

Zero-gravity technology
Ultimate relaxation posture × Advanced pressure distribution

Building on the core features of the BRAIN SLEEP MATTRESS FLOAT—including exceptional breathability, water-washable design, and support for an ultimate relaxation posture—this high-end model further elevates pressure distribution to the highest level.

Use it on your existing bedding, or place it directly on the floor

The MATTRESS FLOAT t is designed with a firm base surface that minimizes the influence of what lies beneath it.
Whether placed on an existing mattress or futon, or used directly on flooring or tatami, this mattress adapts seamlessly to a wide range of sleep environments.
With sufficient rebound and support, it delivers comfortable sleep even when used on its own.
Its versatility also makes it a practical option as a futon-style mattress, convenient for temporary use or accommodating overnight guests.

A mattress sheet for easy replacement and washing

◾️Compatible mattress
BRAIN SLEEP MATTRESS PLUS FLOAT

Materials outer fabric: 100% cotton (filling: 100% polyester)