SWEAT IS DATA.
THE PROBLEM.
Most athletes don’t know how much fluid or sodium they lose when they sweat - and that guesswork leads to cramping, disrupted post-race sleep, empty legs, and dehydration hangovers across training, racing, and recovery. Hydration is deeply personal. Yet most hydration plans aren’t.
SWEAT INTELLIGENCE.
THE SOLUTION.
FLOWBIO uses the world’s most accurate sweat sensor to measure your fluid and sodium loss in real time, with that data powered by AHi® - Advanced Hydration Intelligence - the technology that combines your sweat profile, effort, and environment to deliver personalised hydration insights, so you know exactly what to drink, when, and why.
SWEAT THE DETAILS.
HOW IT WORKS.
The FLOWBIO Sensor measures how much fluid and sodium you lose when you sweat in real-time, with the App acting as your hub - displaying key metrics like fluid loss, sodium loss, and sodium concentration, while using your sweat data, session intensity, and environmental conditions to deliver personalised hydration recommendations through the integrated Hydration Planner.
ADVANCED HYDRATION INTELLIGENCE
PRE, DURING AND POST SESSION.
FILL THE GAP
The Neglected performance pillar
Hydration is a neglected pillar of an endurance athlete’s regime. A clear understanding of your daily fluctuating Sweat Profile is foundational to becoming a stronger, faster athlete.
UNLOCK YOUR NEXT-LEVEL
ADVANCED HYDRATION INTELLIGENCE.
Think of AHi® as the brains behind your FLOWBIO System - the sensor & app working together. It takes the data from your sweat - fluid & sodium loss (salt) - mixes it with key information like temperature and intensity, and turns it into personalised advanced hydration insights. Your sweat, decoded - so you know exactly what to drink, when, and why.
THE SCIENCE OF SWEAT.
Sweating is essential for regulating body heat. You lose water and electrolytes in the process. These losses will change depending on the environmental conditions, exercise intensity, and fitness levels.
By understanding and managing your own water and electrolyte needs, you can mitigate against the negative effects dehydration has on your performance, including decreased endurance, impaired decision-making, reduced coordination, muscle cramps, fatigue and even heat stroke.
FLOWBIO SENSOR
The FLOWBIO Sensor is the world’s most accurate sweat sensor, independently validated to deliver lab precision.
Whether you’re clocking up miles on the bike or pushing the pace on a run, the FLOWBIO Sensor gives you personalised, science-backed hydration data to help you perform better and recover faster.
FLOWBIO measures your sweat rate (L/hr), sodium concentration (mg/L), and skin temperature as you train. That data is synced to the FLOWBIO App, where advanced algorithms turn it into hydration recommendations specific to your physiology and environment.
It’s more than sweat tracking — it’s hydration guidance. Get preparation tips before each session and recovery advice afterwards to keep your performance consistent.
The Hydration Planner creates session-specific strategies, factoring in intensity, temperature, and your own sweat profile. The result: clear recommendations for exactly how much fluid and sodium you need before, during, and after training.
The sensor can be worn on your upper arm with the included FLOWBIO strap, or paired with your HR chest strap. With a 100-hour battery life and USB-C charging, it’s built to keep up with your training.
The app connects with Garmin, Zwift, Wahoo, and Coros, and works with your preferred electrolyte brand, so it fits into the way you already train.
What sets FLOWBIO apart is its independent validation: lab precision of up to 90% and in-field accuracy as high as 83% for sodium loss. No other system delivers this level of accuracy in real training conditions.
And unlike other platforms, FLOWBIO is a one-time purchase — no subscriptions, just lasting performance insights.