BRAIN SLEEP COMFORTER PERFECT WARM DUAL

BRAIN SLEEP COMFORTER PERFECT WARM DUAL

1 12
size
¥55,000
¥55,000
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Precautions for use +

• When washing, use a laundry net and wash each item separately.
• Do not use bleach.
• Due to friction when wet or in contact with other wet items, color fading or color transfer may occur. Do not leave the product wet.
• Due to the nature of the material, pulling strongly on the pile surface may cause fibers to come loose.
• Due to friction, pilling or fiber shedding may occur. Using a laundry net is recommended when washing.
• If the product does not fit in a home washing machine, please use a large-capacity coin laundry or consult a professional cleaning service.
• Do not use a tumble dryer.

Materials +

◾️Comforter
<Outer fabric>
Polyester 100%
<Filling>
Layer 1: polypropylene 100%
Layers 2 and 3: polyester 85%,
synthetic fiber (acrylate-based) 15%
Filling weight single: approx. 1.0 kg, semi-double: approx. 1.13 kg, double: approx. 1.27 kg, queen: approx. 1.4 kg

■Inner Blanket
<Outer fabric>
Polyester 100%
<Inner fabric>
Pile section: polyester 100%
Base fabric section: polyester 60%,
rayon 40%
<Filling>
Plant-based fiber (kapok) 43%, polyester 30%, acrylic 20%, synthetic fiber (acrylate-based) 7%
Filling weight: single: approx. 0.28 kg, semi-double: approx. 0.31 kg, double: approx. 0.35 kg, queen: approx. 0.39 kg

Sizes +

■Product size
Single: approx. W150 cm × L210 cm (approx. 3,450 g)
Semi-double: approx. W170 cm × L210 cm (approx. 3,620 g)
Double: approx. W190 cm × L210 cm (approx. 4,040 g)
Queen: approx. W210 cm × L210 cm (approx. 4,470 g)

■Storage size
Single / Semi-double: approx. W57 cm × D30 cm × H40 cm
Double / Queen: approx. W57 cm × D35 cm × H40 cm

Proteger Extended Warranty +

The extended warranty must be purchased at the same time as the product. We cannot accept orders for the warranty alone. It is different from the service that comes with the product.
View full details

A pioneering material for the industryA next-generation
comforter
that goes beyond down

A layered comforter that adapts to temperature changes
from autumn through spring

Surpassing down in every aspect
Comparison with down materials

A pioneering material for the industryCARBON NANO DOWN

　

A comfort-optimized DUAL constructionAir pockets

Comfortable warmth across a wide range
of environments in Japan

In addition

An optimized DUAL construction supports
comfortable sleep beyond winter

Long-lasting comfort through autumn and spring

Autumn

Comforter

Winter

Comforter
+
inner blanket

Spring

inner blanket

Exceptional value in a comforter
Clean and streamlined on the bed and in storage

TECHNOLOGY

01PERFECT WARM

Exceptional warmth beyond down
Newly developed granular filler
CARBON NANO DOWN

  • Moisture retention
  • Moisture absorption and heat generation
  • Far-infrared radiant heat
  • Moisture absorption and release
  • Compression recovery
  • Washability
  • Antibacterial
  • Dust mite resistance
  • Deodorization

COMFORTER (Duvet)

Outstanding moisture-absorbing heat generation
Approximately three times that of conventional granular fills
[CARBO NANO DOWN]

COMFORTER (Duvet)

This image captures the temperature change observed when water vapor was applied to CARBON NANO DOWN.
As the material absorbed moisture, the temperature increased from 18.2°C to 33.5°C.

Heat retention through a
3D twin-quilt construction

Conventional down comforters tend to lose heat through quilt seams.
This comforter adopts a proprietary 3D twin-layer quilt construction, in which the upper and lower quilting layers do not overlap.
By controlling excess bulk, the construction maintains exceptional thermal insulation while preventing warmth from escaping

Warm yet breathable comfort for
restful sleep

Compared with down comforters, breathability is significantly improved.
By absorbing and releasing moisture across the entire comforter, it supports a moisture-balanced, non-clammy sleep environment

INNER BLANKET

A proprietary developed
new material that absorbs moisture and generates heat
[KAPOK HEAT EX]

INNER BLANKET

The filling features [KAPOK HEAT EX], a proprietary moisture-absorbing and heat-generating material developed to surpass down.
It combines [kapok], a plant-based fiber that generates heat by absorbing moisture, with [acrylic] for thermal insulation and [acrylate] with high moisture-absorbing heat performance.
By avoiding animal fibers, this construction achieves a lightweight inner blanket with high thermal insulation, supported by its moisture-absorbing and heat-generating properties.

Kapok is a tree native to Southeast Asia.
The fiber harvested from its fruit is exceptionally lightweight, weighing approximately one-eighth that of cotton.
As a non-animal fiber, kapok has gained increasing attention in recent years as a sustainable, high-performance material.

Dual-layer use

Exceptional warmth through a double-layer air pocket

Dual-layer use

In extreme cold conditions, the two layers can be combined to form a larger air pocket (air layer).
By trapping "air", which has inherently high thermal insulation properties, the construction maintains comfortable warmth through the night.

Thermal insulation that far exceeds down

Compared with goose down, which is regarded as a high-quality down material,
this product achieves approximately 168% thermal insulation performance

The granular filling gently conforms to the body, blocking cold air while keeping warmth inside.

Maximized fit to the body
Keeps warm air securely in place

The granular filling, outer fabric, and quilt construction work together to create a close, body-hugging fit.
By blocking cold air, warmth is maintained throughout the night.

02PERFECT COMFORT

A comfortable dual structure adjustable in three ways to suit your environment

One DUAL is the only comforter you need.

Most comforters are designed for limited seasons, often requiring different ones throughout the year.
With the Dual, you can use a single layer or combine two layers depending on the season.
No extra comforters are needed, and storage stays compact.

Down-like granular fill
An exceptionally soft feel that goes beyond down comforters

Granular fill formed into down-like spheres of varying sizes interlock much like natural down, allowing warm air to be held without escape.
Because no rigid, feather-like materials commonly used in down fillings are used,
this design also achieves a softer, more fluid drape than traditional down comforters.

One-touch attachment and removal
Stays securely in place for uninterrupted comfort

When a standard comforter and blanket are layered, shifting during sleep is common.
DUAL connects easily with hooks, allowing the layers to be secured without slipping.
Warmth is maintained without concern for misalignment,
supporting a stable and comfortable sleep through the night.

03PERFECT
CLEAN

Machine-washable at home
Clean and comfortable, day after day

A winter comforter that can be machine-washed at home

A common concern with washable comforters is their size.
By separating the comforter and blanket, each layer can be washed individually in a standard home washing machine.


Guidelines for washing machine capacity
• Comforter (single / semi-double): washing machines with a capacity of 7 kg or more
• Comforter (double / queen): washing machines with a capacity of 9 kg or more
Capacity requirements may vary depending on the washing machine model and design.
※Please refer to the manufacturer’s instructions for your specific machine.

CARBONANO DOWN delivers ultimate cleanliness.

[CARBON NANO DOWN], used as the filling, offers bacteriostatic performance that goes beyond antibacterial treatment.
It suppresses bacterial growth, neutralizes unpleasant perspiration odors, and helps prevent dust mites for a consistently clean sleep environment.

Lint generation is just 3% of that of down comforters

Because lint generation from the comforter is kept to an absolute minimum, it can be used daily with peace of mind.

Compact, space-saving storage when not in use

Storage is an essential part of bedding.
With the included storage bag, the comforter can be stored neatly and compactly without taking up extra space.

Compression storage is also perfectly fine

Down comforters are generally not recommended for compression storage, as feathers can pierce the fabric and escape.
However, DUAL can be safely stored in compression bags, allowing for even more space-saving storage.

Specification comparison chart

Warmth Usable
seasons		 Air conditioning
efficiency		 Washability Storage Breathability Dust
generation		 Dust mite
resistance		 Animal-free Odor control
COMFORTER
DUAL		 ◎ autumn through spring ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎
Down
materials		 ○ Winter △ × × × × × × ×
COMFORTER
DUAL		 Down
materials
Warmth ◎ ◎
Usable
seasons		 autumn through
spring		 Winter
Air conditioning
efficiency		 ◎ △
Washability ◎ ×
Storage ◎ ×
Breathability ◎ ×
Dust
generation		 ◎ ×
Dust mite
resistance		 ◎ ×
Animal-free ◎ ×
Odor control ◎ ×

SCENE

SPECSpecifications

Size

Single: approx. W150 cm × L210 cm (approx. 3,450 g)
Semi-double: approx. W170 cm × L210 cm (approx. 3,620 g)
Double: approx. W190 cm × L210 cm (approx. 4,040 g)
Queen: approx. W210 cm × L210 cm (approx. 4,470 g)
Storage size
Single / Semi-double: approx. W57 cm × D30 cm × H40 cm
Double / Queen: approx. W57 cm × D35 cm × H40 cm

Storage size
Single / Semi-double: approx. W57 cm × D30 cm × H40 cm
Double / Queen: approx. W57 cm × D35 cm × H40 cm

Color

Stone gray

Material

●Comforter
・Outer fabric:
Polyester 100%
・Insulation:
Layer 1: Polypropylene 100%
Layers 2 & 3: Polyester 85%, synthetic fiber (acrylate-based) 15%

●Inner blanket
・Outer fabric:
Front side: Polyester 100%
Back side: Pile section: Polyester 100%
Base fabric: Polyester 55%, Rayon 45%
・Insulation:
Plant-based fiber (kapok) 43%
Polyester 30%
Acrylic 20%
Synthetic fiber (acrylate-based) 7%

On days with wide temperature swings,
one comforter does it all.

FAQFrequently asked questions

Is it machine-washable?

It is machine-washable at home. Remove the comforter and inner blanket, place each piece separately in a laundry net, and wash them individually.
Recommended washing machine capacity:
Single / Semi-double: 7 kg or larger
Double / Queen: 9 kg or larger
If the item does not fit comfortably, hand washing or using a large-capacity laundromat machine is recommended.
Do not force it into the machine, as this may cause damage. Always check your washing machine’s instructions before washing.

Can I use bleach?

No. Avoid both chlorine-based and oxygen-based bleach, as they may cause discoloration or fading.

Can I use a tumble dryer?

No. Tumble drying may cause shrinkage or deterioration, so please avoid it.

Can I use a futon dryer?

Yes. However, avoid using it directly on BRAIN SLEEP mattresses or near BRAIN SLEEP pillows, as heat exposure may affect the product’s shape.

How should I dry it?

Wash on a dry, low-humidity day for best results.
Wash early in the day and dry thoroughly, flipping the item occasionally to ensure even drying.
After drying, gently pat the comforter to loosen the filling and restore its fluffiness.

How do I attach the two layers together?

Lay the inner blanket flat with the fleece side facing down.
Check the hook positions on the comforter, align the foot ends, and place the comforter on top.
Fold the collar of the inner blanket upward and fasten all hook buttons securely.
When detaching, do not pull the fabric; remove each hook gently from its base.

How do I use the comforter in 3 different ways?

During very cold weather, use both layers together.
On mildly cold days or when there is a large temperature difference, separate the layers and use one at a time.
Winter: both layers
Autumn to early winter / late winter to spring: comforter only
Early spring or warmer days: inner blanket only
Adjust according to room temperature and personal comfort.

Is a specialized cover required?

The comforter is made in standard sizes and can be used with commercially available duvet covers.
The inner blanket is designed to be used without a cover.
As it is not a standard size (length approx. 230 cm), it does not include corner ties.
Can be washed directly when cleaning is needed.

Can I use a compression storage bag?

Yes. Make sure the comforter is fully washed and completely dry before storing.
When taking it out for reuse, remove it from the bag and spread it out to allow air to fully re-enter the filling before use.

What colors are available?

Stone gray only.

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