Core

Innovative thermal performance monitor for your training and workouts.

Core develops advanced wearables for accurate, continuous monitoring of core body temperature, with applications in sports, wellness, and health. Founded by Wulf Glatz and brought to life by Greenteg AG—a Swiss engineering company specialising in sensor technology—the brand was created to translate industrial-grade thermal insights into practical, wearable formats for health, sport, and workplace safety.

Today, Core is trusted by athletes, performance specialists, and individuals who want to better understand their body’s response to heat—helping them train smarter, recover more effectively, and adapt with science-led precision.

As a UK stockist of Core, browse the selection at Healf.