[GOKUMIN] 'Air conditioner cold vs. too hot when off' - A 2-way reversible cooling blanket 'Hiyatronket' that solves summer sleep dilemmas with a single sheet, newly released on April 30th
KURUKURU Co., Ltd., which operates the comprehensive bedding brand 'GOKUMIN,' has launched 'Hiyatronket,' a 2-way reversible cooling blanket designed to address summer sleep dilemmas. It combines strong cooling and soft cooling materials, along with moisture absorption and antibacterial/deodorant functions, to support comfortable summer sleep.
📋 Article Processing Timeline
- 📰 Published: May 1, 2026 at 05:41
- 🔍 Collected: April 30, 2026 at 21:01
- 🤖 AI Analyzed: May 1, 2026 at 05:20 (8h 18m after Collected)
KURUKURU Co., Ltd. (Headquarters: Ginza, Chuo-ku, Tokyo; Representative Director: Yasuhiro Sekizawa), which operates the comprehensive bedding brand 'GOKUMIN,' launched its summer cooling blanket 'Hiyatronket' on April 30, 2026.
'It's cold with the air conditioner on, but too hot to sleep when it's off,' 'Waking up multiple times at night due to stickiness from sweat' - focusing on these unique summer sleep dilemmas, 'Hiyatronket' is a summer comfort blanket that combines a 2-way reversible structure with a strong cooling material (Q-MAX 0.47) on one side and a soft cooling material (Q-MAX 0.25) on the other, along with moisture absorption and antibacterial/deodorant functions from plant-derived acetate adjusting cotton, and an appropriate weight of approximately 1.4kg.
Development Background | 'Cool with one sheet, comfortable until morning' for summer nights reliant on air conditioning
Summer sleep environments often present a dilemma: 'leaving the air conditioner on (too cold)' or 'turning it off (too hot to wake up).' In addition, many people experience waking up at night due to stickiness from sweat, making summer bedding choices significantly impact sleep quality. 'Hiyatronket' was designed from scratch, considering materials, structure, and weight, based on the question, 'What is a truly cool and comfortable blanket for sleeping until morning?' When used with an air conditioner, it allows the set temperature to be raised by 1-2°C, preventing excessive cooling of the body while providing a continuous feeling of coolness until morning.
Four Features of 'Hiyatronket'
[Reversible design with two levels of coolness]
The front side features a strong cooling material with a Q-MAX of 0.47, cooling the skin the moment it's touched. The back side offers a soft cooling material with a Q-MAX of 0.25, providing a gentle and mild coolness. Use the strong cooling side at night and flip it to the soft cooling side in the early morning. This reversible design allows for adaptation to changes in perceived temperature throughout the night with a single sheet.
[GOKUMIN's unique 3-layer design]
The middle layer uses acetate adjusting cotton (100g/㎡) blended with plant-derived materials. It quickly absorbs and releases moisture during sleep, ensuring 'coolness without stuffiness' lasts until morning. The outer fabric is 90% nylon/10% polyurethane, and the inner fabric is 80% rayon/20% polyester, forming a 3-layer structure where cooling, moisture absorption, and texture are independently optimized.
['Tender' texture and an appropriate weight of approximately 1.4kg]
Some say that blankets that are too light don't fit the body well and feel unsettling. 'Hiyatronket' gently wraps the body with an appropriate weight of approximately 1.4kg, creating a comforting sense of unity. In addition to the cool sensation, the 'tender' and soft texture envelops the entire body, pursuing a sleep experience that is 'cool yet somehow comfortable.'
[Plant-derived antibacterial/deodorant filling x machine washable for daily cleanliness in summer]
The 'Naia™' filling (from Eastman Chemical Company, USA) is made from wood pulp and has obtained three international certifications: USDA, OEKO-TEX®, and FSC®. It is a plant-derived fiber that suppresses bacterial growth. It prevents unpleasant odors even in summer when sweating is common. Furthermore, it is machine washable (using a laundry net) and dries quickly, allowing for clean and comfortable use throughout the summer.
'Hiyatronket' Product Overview
[Price] 8,098 yen (tax included)
[Size] Approximately 140 x 190 cm
[Weight] Approximately 1.4 kg
[Color] Navy x Gray
[Release Date] April 30, 2026
[Retailers]
■ Official EC: https://gokumin.co.jp/products/g-hytrket-s-nvg-01
■ Amazon: https://www.amazon.co.jp/dp/B0GYRDQZW3
■ Yahoo! Shopping: https://store.shopping.yahoo.co.jp/shuterlife/g-hytrket-s-nvg-01.html
■ Rakuten Ichiba: https://item.rakuten.co.jp/gokumin/g-hytrket-s-nvg-01/
*Product prices may vary.
'GOKUMIN' - Cumulative sales of 2 million units in the series
Because sleep is the beginning of a happy day.
GOKUMIN, a Japanese bedding brand, offers high-quality bedding at affordable prices. Thanks to our efforts, we have received numerous awards, including the 'Amazon.co.jp Seller Award 2023' and achieving three awards in the bedding brand category for two consecutive years. We are highly regarded by many people. To realize healthy and prosperous daily lives as advocated by the SDGs, we will continue to pursue products that are 'always the right choice.'
Related Press Releases
● [GOKUMIN] A new concept for 'pillow refugees.' 'Funyutoro Makura,' a meltingly soft pillow made with ultra-fine fibers, newly released
https://pr
'It's cold with the air conditioner on, but too hot to sleep when it's off,' 'Waking up multiple times at night due to stickiness from sweat' - focusing on these unique summer sleep dilemmas, 'Hiyatronket' is a summer comfort blanket that combines a 2-way reversible structure with a strong cooling material (Q-MAX 0.47) on one side and a soft cooling material (Q-MAX 0.25) on the other, along with moisture absorption and antibacterial/deodorant functions from plant-derived acetate adjusting cotton, and an appropriate weight of approximately 1.4kg.
Development Background | 'Cool with one sheet, comfortable until morning' for summer nights reliant on air conditioning
Summer sleep environments often present a dilemma: 'leaving the air conditioner on (too cold)' or 'turning it off (too hot to wake up).' In addition, many people experience waking up at night due to stickiness from sweat, making summer bedding choices significantly impact sleep quality. 'Hiyatronket' was designed from scratch, considering materials, structure, and weight, based on the question, 'What is a truly cool and comfortable blanket for sleeping until morning?' When used with an air conditioner, it allows the set temperature to be raised by 1-2°C, preventing excessive cooling of the body while providing a continuous feeling of coolness until morning.
Four Features of 'Hiyatronket'
[Reversible design with two levels of coolness]
The front side features a strong cooling material with a Q-MAX of 0.47, cooling the skin the moment it's touched. The back side offers a soft cooling material with a Q-MAX of 0.25, providing a gentle and mild coolness. Use the strong cooling side at night and flip it to the soft cooling side in the early morning. This reversible design allows for adaptation to changes in perceived temperature throughout the night with a single sheet.
[GOKUMIN's unique 3-layer design]
The middle layer uses acetate adjusting cotton (100g/㎡) blended with plant-derived materials. It quickly absorbs and releases moisture during sleep, ensuring 'coolness without stuffiness' lasts until morning. The outer fabric is 90% nylon/10% polyurethane, and the inner fabric is 80% rayon/20% polyester, forming a 3-layer structure where cooling, moisture absorption, and texture are independently optimized.
['Tender' texture and an appropriate weight of approximately 1.4kg]
Some say that blankets that are too light don't fit the body well and feel unsettling. 'Hiyatronket' gently wraps the body with an appropriate weight of approximately 1.4kg, creating a comforting sense of unity. In addition to the cool sensation, the 'tender' and soft texture envelops the entire body, pursuing a sleep experience that is 'cool yet somehow comfortable.'
[Plant-derived antibacterial/deodorant filling x machine washable for daily cleanliness in summer]
The 'Naia™' filling (from Eastman Chemical Company, USA) is made from wood pulp and has obtained three international certifications: USDA, OEKO-TEX®, and FSC®. It is a plant-derived fiber that suppresses bacterial growth. It prevents unpleasant odors even in summer when sweating is common. Furthermore, it is machine washable (using a laundry net) and dries quickly, allowing for clean and comfortable use throughout the summer.
'Hiyatronket' Product Overview
[Price] 8,098 yen (tax included)
[Size] Approximately 140 x 190 cm
[Weight] Approximately 1.4 kg
[Color] Navy x Gray
[Release Date] April 30, 2026
[Retailers]
■ Official EC: https://gokumin.co.jp/products/g-hytrket-s-nvg-01
■ Amazon: https://www.amazon.co.jp/dp/B0GYRDQZW3
■ Yahoo! Shopping: https://store.shopping.yahoo.co.jp/shuterlife/g-hytrket-s-nvg-01.html
■ Rakuten Ichiba: https://item.rakuten.co.jp/gokumin/g-hytrket-s-nvg-01/
*Product prices may vary.
'GOKUMIN' - Cumulative sales of 2 million units in the series
Because sleep is the beginning of a happy day.
GOKUMIN, a Japanese bedding brand, offers high-quality bedding at affordable prices. Thanks to our efforts, we have received numerous awards, including the 'Amazon.co.jp Seller Award 2023' and achieving three awards in the bedding brand category for two consecutive years. We are highly regarded by many people. To realize healthy and prosperous daily lives as advocated by the SDGs, we will continue to pursue products that are 'always the right choice.'
Related Press Releases
● [GOKUMIN] A new concept for 'pillow refugees.' 'Funyutoro Makura,' a meltingly soft pillow made with ultra-fine fibers, newly released
https://pr