Product Description
Stop Guessing About Your Hydration
You drink when you're thirsty. You follow generic hydration plans. You wonder why you're still cramping at hour 3 Not only are your sweat rate and sodium loss are completely unique to you, they change with every training session, temperature shift, and fitness adaptation. Generic hydration advice fails because it treats every athlete the same.
The hDrop Gen 2 is an impressively easy, reusable wearable hydration sensor that gives you real-time data on your sweat loss, sweat rate, sodium depletion, and sweat composition.
Know Your Sweat
Real-Time Sweat Intel – While disposable patches give you post-workout data, the hDrop Gen 2 tracks your hydration metrics every second during your training. You'll see exactly when you start sweating, how fast you're losing fluid, and what your sodium levels are doing—all while you're still out there.
Personalized Hydration Strategy – The companion app analyzes your sweat profile and delivers tailored hydration recommendations based on YOUR body's actual losses. No more following pro athlete protocols that don't match your physiology.
Built to Last, Not Trash – Unlike single-use sweat patches that cost $5-12 per workout, the hDrop Gen 2 is fully reusable with a rechargeable battery delivering 120 hours of active tracking per charge. That's unlimited sweat testing without the recurring costs or environmental waste.
Real Recommendations – Not only does it give you insight into your sweat rate and needs, it also gives real world recommendations for products that might match your hydration needs.
The technology uses proprietary electrode sensors to measure fluid and electrolyte losses continuously. The lightweight 30mm x 30mm device clips onto any heart rate monitor strap—chest or arm-based—and connects via Bluetooth to the iOS and Android app for instant feedback during your session.
Using The hDrop Sweat Monitor
Attach the hDrop Gen 2 to your heart rate strap before training. The device automatically detects when you start sweating and begins tracking. Review real-time metrics during your workout through the app, or check post-session analysis for detailed hydration insights.
Use it for every key workout to build your personal sweat profile database. The more data you collect across different conditions, the more precise your customized hydration strategy becomes.
Pro tip: Track sessions in various temperatures and intensities to understand how your sweat profile changes, then use those insights to dial in race-day fueling.
The hDrop Gen 2 is trusted by endurance athletes who need precision hydration data to optimize performance. This is your personalized hydration coach that never guesses and never stops learning what YOUR body needs.
For gear that arrives damaged or falls under the manufacturer's warranty: Please send a photo of the damage or error message to hello@thefeed.com. We will either help process a claim for the product and a replacement product or store credit will be provided, or we will direct you towards the correct place to make a warranty claim for the product. For returns on gear that you have used, we follow the manufacturer's instructions for satisfaction guarantees. This is specific to each gear product, terms and conditions may change.
hDrop Gen 2 FAQ's
Everything you need to know before getting started.
It uses proprietary electrode sensor technology to continuously measure electrical changes in your sweat, directly related to the sweat sodium concentration and estimates fluid losses. The data syncs to the companion app via Bluetooth for instant feedback.
No, it is a standalone device. It can be clipped onto any standard heart rate monitor strap, whether chest or arm based, or onto the provided straps included with the device in medium and large sizes. The body location is selected in the hDrop App to ensure accurate sweat measurement based on where the device is worn.
A single charge provides 120 hours of active tracking time. The device is rechargeable via USB, so you can use it for days of training on one charge cycle.
The hDrop Gen 2 is rated IP66, meaning it is resistant to sweat and light rain. It is not designed for use in heavy rain, swimming, or sauna environments.
The device has been independently and scientifically validated, with preliminary results showing an average accuracy of 92% for fluid loss and 87% for sodium loss over 60 minutes of exercise. These measurements provide consistent, actionable data to support the development of a personalized hydration strategy over time.
The hDrop Gen 2 connects via Bluetooth to the companion smartphone app on iOS and Android. It also integrates with Garmin through a data field that writes directly into your FIT files. In addition, other wearables can be linked to the hDrop App via Health Connect or Apple HealthKit to display heart rate data within the app.