12.12FRI
2025.12.10
Bringing Winter Sports Expertise to Everyday Life! Unpacking the Tech Behind Mizuno's "Breath Thermo Compact Down Jacket," a Culmination of Over 30 Years of Innovation
Moisture-wicking, heat-generating fabrics may be commonplace today, but Mizuno was a pioneer, starting development over 30 years ago and launching its high-performance material, "Breath Thermo," in 1992. To learn more about the technology behind the wildly popular "Breath Thermo Compact Down Jacket," which incorporates this material, we sat down with Shinji Yamamoto from the Global Apparel Product Division at Mizuno Corporation.
PROFILE
Shinji Yamamoto
Mizuno Corporation
Global Planning & Design Office, Global Apparel Product Division
The journey of Mizuno's Breath Thermo, a material that has powered countless athletes, began with skiwear. In the frigid environments of winter sports, warmth isn't just about comfort—it's a critical factor that directly impacts competitive performance.
Mizuno zeroed in on the natural property of wool to generate heat when it absorbs moisture. They successfully managed to replicate this heat-generating mechanism using synthetic fibers.
The Fiber That Made It to the National Team's Uniforms
"It's a material that harnesses what we call 'adsorption heat,' which occurs when the kinetic energy of water vapor is converted into thermal energy as it sticks to the fiber's surface," explains Yamamoto. "This raw fiber generates roughly three times the adsorption heat of wool or down. It also traps that heat between the fibers, maintaining warmth for extended periods."CONCEPT VIDEO
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