As concerns over climate change and rising temperatures grow, finding practical solutions for keeping people safe and comfortable is becoming a major challenge for cities around the world. USA-based startup Eztia Materials has developed ''HydraVolt,'' a next-generation cooling material aimed at people working in extreme heat sectors, such as construction, logistics, and defense. Eztia CEO Tiffany Yeh discusses the story behind this innovation and its potential across a wide range of applications.