Zurich, Switzerland – March 25th, 2025 – The wait is over. CORE 2, the next-generation wearable core body temperature sensor, is now available for purchase—bringing pro-level precision, next-gen connectivity, and ultimate comfort to athletes, teams, and professionals pushing their limits of performance in increasingly extreme environments. Building on the proven success of the original CORE sensor—trusted by elite athletes, military units, and researchers worldwide—CORE 2 is 48% smaller, even smarter, and more powerful, offering cutting-edge functionality in a sleek, compact form.
CORE 2 is now available to order at www.corebodytemp.com and select retailers globally, with orders beginning to ship in the week of the 16th of April.
Join a live webinar with CORE on March 24th at 1200 CET to learn about CORE 2 and ask your own questions. Register here.
Whats New with CORE 2?
- 48% Smaller and 30% Lighter: Performance you don’t even notice. Perfect for athletes, tactical operators, and endurance warriors.
- An improved, modular attachment design allows CORE 2 to be mounted and removed from a heart rate strap more easily.
- A new red LED battery indicator light informs users when the sensor needs charging.
- Next-Gen Swiss Sensors for Unmatched Accuracy: The most precise real-time core temperature monitoring yet, powered by cutting-edge Swiss technology.
- Improved Design: An improved, modular attachment design allows CORE 2 to be mounted and removed from a heart rate strap and the clip itself more easily.
More Than a Sensor: A Smarter, Fully Connected Ecosystem
CORE is redefining how athletes, teams, and professionals monitor and manage heat stress. Whether using the original CORE sensor or the new CORE 2, all users now benefit from an expanded ecosystem that transforms data into actionable insights:
- New Smart Data in an updated Garmin ConnectiQ App, and more to come in the weeks ahead with Zwift and TrainingPeaks: View not just core temperature, but Heat Zone, Time in Zone and and Heat Strain Index data directly, making it easier to train and race, with heat train metrics.
- New Passive Heat Training: The updated CORE app now allows all CORE users to input passive heat training sessions to better plan daily heat strain and calculate these sessions into their Heat Adaptation Score..
These advancements matter because heat training and managing core body temperature has been shown to deliver measurable performance gains:
- 4–6% increase in VO₂ max in sub-elite athletes
- 8% time-trial improvement for cyclists after just 10 days of heat training
- 2.5% increase in hemoglobin mass with sustained heat acclimation
"With CORE 2 and our growing digital ecosystem, we’re giving athletes and professionals smarter tools to make better decisions in real-time and over the long term," said Ross McGraw, VP & Head of CORE.
Trusted by 16 Olympic Gold Medalists, dozens of World Champions, and nearly every UCI WorldTour team, CORE delivers real-time core temperature insights that help users push limits, stay safe, and perform at their peak.
"CORE 2 represents the future of performance monitoring, giving real-time insight into how our bodies respond to heat and exertion — and helping us optimize for success and safety." — Olav Aleksander Bu, world-renowned coach to Olympic and World Champions.
Technical Specifications: Compact, Rugged, and Smart
- Dimensions: 41.9 x 29.4 x 7.1mm (sensor only) | 45.1 x 32.6 x 9.6mm (with clip)
- Weight: 8.6g (sensor) | 11.4g (with clip)Battery: Up to 6 days (active), 30 days (standby)
- Charging: USB-C magnetic adapter cable (included)
- Connectivity: BLE & ANT+ (2.4 GHz band)
- Waterproof: IPX7 (up to 1.5m)
- Accuracy: Research-backed with a mean difference range of -0.01°C to +0.23°C
Pricing and Availability
Available March 25th, 2025 — Orders Now OpenCORE 2 officially launches on March 25th, 2025, and is now available at corebodytemp.com and via authorized resellers worldwide.
- CHF 269.95 (incl. VAT)
- €314.95 (incl. VAT)
- £264.95 (incl. VAT)
- $294.95 (local tax rates may apply)
Trade-Up Program: Existing CORE users can trade in their CORE 1 device and receive 30% off a CORE 2 upgrade — available from March 25 to June 30, 2025. Learn MoreTo learn more about CORE 2 and how core body temperature is shaping the future of performance monitoring, visit www.corebodytemp.com.
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ABOUT CORE
CORE is a division of greenteg AG and provides expertise and technology for thermal management in sports. The CORE sensor is a real-time core body temperature monitor built with the advanced, Swiss-made Calera thermal energy transfer sensor, which provides medical-grade accuracy. It is the only wearable solution that allows athletes to continually monitor accurate core body temperature data without the need for an ingested or inserted thermometer.
Zürich-headquartered greenteg AG manufactures and supplies thermal energy transfer sensors, which are also used across a host of applications beyond sports, including medical use, photonics, thermal efficiency measurements in construction, and workplace health and safety. www.corebodytemp.com
Zürich-headquartered greenteg AG manufactures and supplies thermal energy transfer sensors, which are also used across a host of applications beyond sports, including medical use, photonics, thermal efficiency measurements in construction, and workplace health and safety. www.corebodytemp.com
PRESS INFO
Webinar
Join us on March 24th at 12 CET for an exclusive webinar to learn about CORE 2 from the team at CORE. Register here: https://zoom.us/webinar/register/WN_9PVY6qGiSAW06cIx_IRfJw
Media Kit free to download and use, credit CORE: Images
References
Technical Product Specs and FAQs https://corebodytemp.com/blogs/news/coming-march-2025-core-2
Media Contact
Media Contact
Fiola Foley: fiola@4seasoncollective.com
Tel. +363 87 032 5565
