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Launched on a Japanese crowdfunding platform Makuake
The “perfect warm” series
Total funding exceede
JPY 230 million
A sustainably developed heat-generating technology designed to surpass traditional down insulation.
“KAPOK HEAT EX” combines plant-based kapok fibers that absorb moisture and generate heat with highly insulating acrylic fibers and moisture-absorbing, heat-generating acrylate fibers.
This proprietary insulation construction converts absorbed moisture into gentle warmth while maintaining a sustainable material profile.
Kapok is a natural fiber harvested from the fruit of kapok trees native to Southeast Asia.
Known for its exceptional lightness—approximately one-eighth the weight of cotton—kapok is a plant-based fiber rather than an animal-derived material.
In recent years, it has gained attention as a sustainable, high-performance material.
“KAPOK HEAT EX” absorbs moisture within the bedding environment and converts it into heat.
In testing, a temperature increase of up to 5.1°C was observed after 7 minutes of measurement.
Using a mattress protector helps reduce cold coming from below and prevents chill from reaching the back.
In winter, cold air tends to accumulate near floors and ground surfaces, and this cold can be felt through the mattress.
The mattress protector is effective in helping shield the body from this cold.
Sweat absorption, reduced uneven feel, and mattress protection—all in a single layer.
A one-piece design makes installation, removal, and washing simple.
■ Compatible mattress height:
In general, mattresses with a height of approximately 20–30 cm are compatible.
Mattresses with a lower height can also be used; however, excess fabric may remain on the underside.
Please ensure the fabric is securely tucked in when in use.
■ Sizes
•Single: approx. W100 × L205 cm (approx. 1,140 g)
•Semi-double: approx. W120 × L205 cm (approx. 1,300 g)
•Double: approx. W140 × L205 cm (approx. 1,470 g)
■Color:
Stone gray
■ Materials:
・Side fabric
Front fabric: pile polyester 100%
Base fabric: polyester 60%, rayon 40%
Back fabric: polyester 100%
Mattress skirt: polyester 94%, polyurethane 6%
・Insulation
Plant-based fiber (kapok) 43%, polyester 30%, acrylic 20%
Synthetic fiber (acrylate fiber) 7%
Yes. Place the product in a laundry net and wash it separately.
Please avoid the use of bleach.
Please note that tumble drying should be avoided.
Stone gray
Compatible mattress height is approximately 20–30 cm.
Mattresses with a lower height can also be used; however, excess fabric may remain on the underside.
Please ensure the fabric is securely tucked in when in use.
Anti-static processing has been applied to the protector.
In addition, the materials used—including moisture-absorbing polyester and rayon—help reduce static electricity.
Please note that static electricity may still occur depending on indoor humidity levels.
If static electricity becomes noticeable, using a humidifier in the bedroom or lightly misting the product with water or deodorizing spray is recommended.
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