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greenTEG CORE bracelet
(Product No.: CR-A-165175)
CORE Size Chart
CORE Body Temperature / greenTEG does not use a traditional body size chart. The relevant sizing information is the physical size of the sensor and the fit of its wearing systems. The following overview is aligned with the CORE products currently listed at fit-und-warm.ch.
CORE 1 Body Temperature Sensor – Technical Size
| Product | Width | Height | Depth | Weight | Water protection |
|---|---|---|---|---|---|
| CORE 1 Sensor | 40 mm | 50 mm | 8.35 mm | 12 g | IPX7 / waterproof to 1.5 m |
Current FuW model: The 8.35 × 40 × 50 mm dimensions listed at fit-und-warm.ch correspond to the official CORE 1 sensor. The manufacturer now also offers CORE 2; that newer generation has different dimensions and should not be confused with the CORE 1 measurements.
Wearing Systems – Size and Fit
| Product | Size | Material / construction | Use |
|---|---|---|---|
| CORE Chest Strap | One Size / adjustable | Soft stretchable nylon | Wears the sensor on the chest; manufacturer-preferred position for precise sports measurements |
| CORE Arm Strap | One Size / adjustable | Elastic perforated material with hook-and-loop closure | Wears the sensor on the upper arm |
| Medical-grade adhesive patches | One size for CORE 1 | Adhesive patches | Alternative direct torso attachment |
| Securing clips | for CORE 1 | 2 clips per official replacement pack | Secures the sensor to a heart-rate or chest strap |
Arm strap note: The current official CORE arm strap is described as one-size-fits-all. The manufacturer also states that this arm strap is not recommended for CORE 2. It remains appropriate for the CORE 1 system currently listed at FuW.
CORE Team Bundle – Contents
| Component | Quantity | Size / capacity note |
|---|---|---|
| CORE Body Temperature Sensor | 6 | 40 × 50 × 8.35 mm / 12 g each |
| CORE Charging Station | 1 | for up to 6 sensors at the same time |
| CORE Chest Strap | 1 | One Size / adjustable |
| CORE Arm Strap | 1 | One Size / adjustable |
| CORE Body Plasters | 24 | for sensor attachment |
Charging Station and Charging Cable
| Product | Capacity / connection | Note |
|---|---|---|
| CORE Six-Bay Charging Station | up to 6 CORE devices | Stores and charges multiple sensors at the same time; LED charging indicators |
| CORE 1 Charging Cable | Magnetic device connection / USB-A | Designed for CORE 1; do not confuse with the magnetic USB-C cable used for CORE 2 |
CORE 1 – Additional Technical Specifications
| Feature | Specification |
|---|---|
| Battery life | up to 6 days continuous transmission / up to 6 weeks in sleep mode |
| Power supply | Rechargeable lithium-polymer battery |
| Connectivity | Bluetooth / ANT+ |
| Measurements | Core body temperature and skin temperature |
| Wearing position | On the torso, typically on a heart-rate strap or with adhesive patches |
Which Size Should You Choose?
- Sensor: CORE 1 has no size variants; all users use the same sensor unit.
- Chest strap: One Size and adjustable.
- Arm strap: One Size and adjustable.
- Team Bundle: suited to teams or groups that need to use and charge several sensors.
- Accessories: distinguish carefully between CORE 1 and CORE 2 because clips, cables and some wearing options are generation-specific.
Notice: The CORE 1 sports product currently listed at FuW is used for training and performance monitoring. The current FuW product page explicitly states that the CORE Body Temperature Sensor is not a medical device and is not intended to diagnose or monitor a medical condition. Seek medical advice for health concerns or unusual temperature readings.
Sources: official CORE / greenTEG product pages for CORE 1 Sensor, Chest Strap, Arm Strap, securing clips and charging cable; current CORE brand and product pages at fit-und-warm.ch. Status 08/2026.