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Exceptionally warm
comforter cover
On the crowd funding platform Makuake,
the “PERFECT WARM” series
Surpassed a cumulative
¥230 million in support!
Introducing the warmest and most comfortable cover ever
created by BRAIN SLEEP.

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Want to add more warmth to your current comforter -
Washing a comforter feels like a hassle -
Layering a comforter and blanket always slips out of place
When that happens,
simply add
COMFORTER COVER PERFECT WARM,
an easy way to enhance
warmth and comfort.

POWER UP
Comfortable warmth surrounds the body
from the very first moment,
with a smooth, gentle feel.
POWER UP
Comfortable warmth surrounds the body
from the very first moment,
with a smooth, gentle feel.
Crafted with a specially engineered fleece fabric that comes remarkably close to the softness of cashmere, it delivers an exceptionally soft, silky-smooth touch—reminiscent of true cashmere.
POWER UP
Recreating the fiber structure of cashmere and wool

POWER UP
Recreating the fiber structure of cashmere and wool
Cashmere and wool feature a unique, scale-like fiber structure that enables excellent moisture absorption and release.
Inspired by these natural scales, the same type of fiber structure was developed from the ground up.
As a result, it achieves high moisture-regulating performance for a dry, non-stuffy environment.
In addition, absorbed moisture is efficiently converted into heat, delivering exceptional warmth.
Ultimate moisture-absorbing heat generation

Ultimate moisture-absorbing heat generation
Absorbs moisture and generates heat like cashmere and wool. A temperature increase of up to 4°C was observed.
Ultimate moisture absorption and release

Ultimate moisture absorption and release
At high humidity levels, moisture is effectively absorbed and released, helping maintain a comfortable sleep environment.
Simply place the cover over your existing comforter
to reach an ideal temperature of approximately 33°C

Simply place the cover over your existing comforter
to reach an ideal temperature of approximately 33°C
Test method: surface temperature test conducted in a winter bedroom environment
(20°C, 65% RH)

Blankets and comforters no longer shift or slip.
Boosts the warmth of the comforter already in use.
FAQFrequently asked questions
Is it machine washable?
Yes. The product is machine-washable.
Please place it in a laundry net and wash separately. Do not use bleach.
Can I use a tumble dryer?
Please avoid tumble drying.
What color options are available?
Available in one color only: Stone Gray.
Does it generate static electricity?
Anti-static treatment is applied. In addition, the materials used—polyester and rayon with moisture-absorbing properties—help reduce static buildup.
However, static electricity may occur depending on the room’s humidity.
If static becomes noticeable, increasing bedroom humidity or lightly misting the product with water or a deodorizing spray is recommended.
Is there a front and back side to the comforter cover?
Please use the brushed side against the skin.
商品レビュー
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