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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
COMFORTER (Duvet)
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.
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
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
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
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.
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.
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.
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.
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.
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.
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.
[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.
Because lint generation from the comforter is kept to an absolute minimum, it can be used daily with peace of mind.
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.
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 | ◎ | × |
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
Stone gray
●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.
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.
No. Avoid both chlorine-based and oxygen-based bleach, as they may cause discoloration or fading.
No. Tumble drying may cause shrinkage or deterioration, so please avoid it.
Yes. However, avoid using it directly on BRAIN SLEEP mattresses or near BRAIN SLEEP pillows, as heat exposure may affect the product’s shape.
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.
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.
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.
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.
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.
Stone gray only.
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
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The ultimate cooling sensation lasts all night long
Summer quilt
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