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Float. Relax. Release.
The ultimate mattress
Passed
30-Year
Durability Test
PRESSURE DISTRIBUTION
COMFORTABLE
IMPROVE BLOOD FLOW
TURN OVER SUPPORT
BREATHABLE
BED TEMPRATURE CONTROL
MITE AND MOLD PREVENTION
WASHABLE
SUSTAINABLE MATERIALS
We spend nearly a third of our lives asleep.
When sleep quality is poor, the brain and body do not fully rest, making it difficult to perform at their natural best.
Because sleep products are part of our everyday lives, why not reconsider sleep from the perspective of quality?
When comparing fatigue recovery after seven hours of sleep on the BRAIN SLEEP mattress versus a typical functional mattress, results showed that the BRAIN SLEEP mattress delivered a 14% higher fatigue recovery rate.
When comparing fatigue recovery after seven hours of sleep on the BRAIN SLEEP mattress versus a typical functional mattress, results showed that the BRAIN SLEEP mattress delivered a 14% higher fatigue recovery rate.
In addition,
Sleep quality is largely influenced by the depth reached during the first 90 minutes after falling asleep.
When this “golden 90 minutes” remains shallow, longer sleep alone does not necessarily improve quality.
This BRAIN SLEEP mattress, designed with breathability in mind, helps lower core body temperature, guiding sleep toward greater depth.
Difficult falling asleep due to heat buildup in the mattress
Excessive sinking can place strain on the body
Too soft / too firm
Restricted turning during sleep
Difficult to care for (not washable, moisture tends to build up)
Dust mites and mold can develop
It is said that sleep is said to makes up
one-third of our lives.
Why not take a fresh look at the mattress —
one of the most important elements of quality sleep?
Flagship model
Pursues exceptional comfort by minimizing and evenly dispersing the physical pressure placed on the body during sleep, delivering ultimate sleep through the combination of "ideal sleep posture" and "advanced pressure dispersion".
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.
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.
Countless fibers form a three-dimensional hybrid rebound structure, providing multidirectional support rather than support in a single plane.
This structure responds optimally to variations in body weight and surface area across different zones.
In addition, the proprietary nine-layer construction absorbs gravitational force and converts it into rebound energy—firmly supporting the body while helping maintain proper sleep posture.
A wire-shaped support core, “Wire Wave,” features fibers of varying thickness designed to correspond to different areas of the body, supporting the body from within the mattress.
By accommodating differences in body pressure across each zone, it prevents excessive sinking and helps maintain an ideal sleeping posture.
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.
A proprietary three-dimensional fiber structure delivers exceptional breathability.
Every turn during sleep releases built-up heat and humidity.
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.
Conventional mattresses cannot be washed, and trapped moisture can lead to the growth of mold and dust mites.
As a result, frequent replacement is often unavoidable.
The BRAIN SLEEP Mattress is not only washable—its material itself resists moisture buildup, making it difficult for dust mites to thrive.
This allows the mattress to remain clean and hygienic overtime.
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.
Everyday use makes durability a key concern when choosing a mattress.
This product has demonstrated high durability through compression testing at three times the JIS standard of 80,000 cycles.
Even with long-term use, it continues to deliver stable comfort.
*Durability may vary depending on usage conditions.
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.
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.
This photo shows the double size. Other sizes are also available.
Single: approx. W100 × L196 × H20 cm (Leg section: 24 cm)
Semi-Double: approx. W120 × L196 × H20 cm (Leg section: 24 cm)
Double: approx. W140 × L196 × H20 cm (Leg section: 24 cm)
Queen: approx. W160 × L196 × H20 cm (Leg section: 24 cm)
Graduated firmness at the shoulder area
Topper sheet: 100% Cotton (Filling: 80% Polyester, 20% rayon)
Base cover: 100% Polyester
Mattress: 100% Polyethylene
The mattress core is made from 100% recyclable materials, designed with consideration for the environment.
Crafted from 100% cotton fabric with excellent moisture absorption and release.
Highly breathable, it offers a smooth, gentle touch that softly envelops the body for a comfortable night’s sleep.
Features a side zipper for easy removal and care.
Flagship model
PREMIUM FLOAT
A premium model offering
the highest level of sleep comfort,
with a 20 / 24 cm profile
The flagship of the Float series, featuring a nine-layer structure that maintains an ultimate relaxation posture and delivers durability designed to last up to 30 years. A bed mattress that further reduces strain on the body.
PLUS FLOAT
A standard model that provides firm support with a thickness of 15 / 19 cm
With a 7-layer construction, the mattress firmly supports the body while promoting a relaxed sleeping posture and smooth turning during sleep, helping maintain comfortable rest throughout the night.
Designed for long-term use of up to approximately 10 years, this model is recommended for those using the Float series for the first time.
FLOAT
A compact model with a 5 / 9 cm profile, designed to achieve ultimate relaxation.
The three-layer structure firmly supports the body while promoting fatigue recovery.
Resistant to the influence of bedding or floor surfaces underneath, it can be placed on an existing mattress, futon, flooring, or tatami—adapting easily to a wide range of sleep environments.
Its foldable design allows for compact storage when not in use.
Have questions about the product?
The development team will answer your inquiries directly. Please feel contact us.
The MATTRESS FLOAT 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.
White
A mattress sheet for easy replacement and washing
Compatible mattress
BRAIN SLEEP MATTRESS PREMIUM FLOAT
*This sheet is not compatible with the “BRAIN SLEEP Mattress The Premium” sold prior to 2022, as the shape and closure specifications (zipper type) differ.
The topper sheet can be used when purchased together with the base cover.
Available for purchase [here].
Materials: 100% Cotton (Filling: 80% Polyester, 20% rayon)
洗い替え用に便利なマットレスシーツです。
A mattress sheet for easy replacement and washing
Compatible mattress
BRAIN SLEEP MATTRESS PREMIUM FLOAT
*This sheet is not compatible with the “BRAIN SLEEP Mattress The Premium” sold prior to 2022, as the shape and closure specifications (zipper type) differ.
The topper sheet can be used when purchased together with the base cover.
Available for purchase [here].
Materials: 100% Cotton (Filling: 80% Polyester, 20% rayon)
This set is designed for customers who already own the Float Mattress, enhancing it into a more premium setup.
*this set cannot be used on its own without the Float Mattress.
Materials
Topper sheet: 100% Cotton (Filling: 80% Polyester, 20% rayon)
Base cover: 100% Polyester
6-Layered Base: 100% Polyethylene
This set is designed for customers who already own the Float Mattress, enhancing it into a more premium setup.
*this set cannot be used on its own without the Float Mattress.
Materials
Topper sheet: 100% Cotton (Filling: 80% Polyester, 20% rayon)
Base cover: 100% Polyester
6-Layered Base: 100% Polyethylene
The product is delivered in three separate packages.
▼Single Size
①Approx. 103 × 69.5 × 48 cm ②Approx. 104 × 69 × 23 cm ③Approx. 62 × 42 × 31 cm
▼Semi-Double Size
①Approx. 123 × 69.5 × 48 cm ②Approx. 124 × 69 × 23 cm ③Approx. 62 × 42 × 31 cm
▼Double Size
①Approx. 143 × 69.5 × 48 cm ②Approx. 144 × 69 × 23 cm ③Approx. 62 × 42 × 31 cm
▼Queen Size
①Approx. 164 × 69.5 × 48 cm ②Approx. 164 × 69 × 23 cm ③Approx. 62 × 42 × 31 cm
Yes. The topper sheet and base cover can be removed and machine-washed.
When using a washing machine, please place them in a laundry net and use a machine with a capacity of 8 kg or more.
Do not use a tumble dryer.
You can rinse the mattress core with water in the shower.
After washing, let it air-dry in a flat, well-ventilated area, out of direct sunlight.
If odors or stains are a concern, we recommend using a mild, diluted neutral detergent.
No. Futon dryers or electric blankets cannot be used.
Also avoid placing the mattress near heaters or other heating appliances, as heat may damage the materials.
No additional sheet is required, as the topper sheet included in the set is easy to attach and remove, and can be machine-washed.
Yes.
We recommend the mattress sheets (box-sheet type) available from the BRAIN SLEEP store, but standard box sheets sold on the market can also be used.
When using a box sheet, please place it over the topper sheet.
For details, please refer to the comparison chart.
By adding an extra layer to your current Float Mattress, you can upgrade it to the Premium model.
The upgrade set is available for purchase here.
Supports side sleeping
Pillow for correcting sleeping posture
For nights when snoring or a dry mouth is a concern
A moisturizing throat spray to keep your throat moist
Medical device
Full recovery just by wearing it to sleep
The ultimate cooling sensation lasts all night long
Summer quilt
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