hDrop Gen 2

Wearable Hydration Sensor

$249.99 & Free Shipping

Excl. taxes & shipping

Achieve Optimal Hydration
Real-time sweat loss, rate, and temperature tracking

Unlock Personalized Insights
Sodium and potassium estimation for custom hydration strategies

Uncompromised Comfort
Easy-to-wear design that integrates seamlessly into your workout routine

Reliable and Long-Lasting
Reusable with a rechargeable battery offering 120 hours of active use per charge

Sweat-Proof and Durable
Designed to endure even the most intense physical activities

Sustainable
One-time investment, eliminating the recurring cost of disposable patches

Yes, we do! hDrop has distribution centers in the US and Netherlands. When you start the pre-order process and input your address, customs, taxes, and duties will be calculated. Customs will be pre-paid from our side so that delivery is hassle free on yours.

The device’s dimensions are as follows: 30mm (L) x 30mm (W) x 15mm (H).

Yes, the hDrop App now supports offline mode. You can start and complete activities with the hDrop even without a stable internet connection, then upload the data later once connectivity is restored. The hDrop works as a standalone product and does not require any additional hardware, only your phone to start and end the activity.

No, we do not recommend using it underwater.

The activities can be 10 hours long. We recommend activities that are 6 or 7 hours long, and starting a new one right away is fairly easy.

Yes, the hDrop comes with two arm straps (two different sizes, M and L). 

We do not recommend using the device in a sauna. It contains a LiPo battery, which can be damaged by prolonged exposure to high temperatures.

hDrop is currently the most accurate wearable sweat sensor in the world. Independent preliminary validation results show 92.5 percent accuracy for sweat loss measurement and 87 percent accuracy for sweat sodium loss during dynamic exercise. These results were obtained under controlled cycling and running protocols across multiple age groups and demographics, with full peer-reviewed publication scheduled for release in 2026.

No, hDrop does not require a subscription.

No, hDrop is fully reusable and does not require disposable patches.

What You Will Get

Unlimited Sweat Testing

Get real-time hydration insights, monitor sweat loss, sweat rate, sodium and potassium depletion, and temperature as you train.

Smart Companion hDrop App
iOS & Android

Get personalized hydration insights and tailored recommendations to optimize your performance.

Seamless Wearability

Lightweight, comfortable, and built to withstand light to the most intense workouts.

Sustainable & Rechargeable

A reusable design with more than 60-hour battery life. Environmental and economical friendly.

Why would you pay for every workout?

The burden of sweat patches

While disposable patches for hydration monitoring can seem convenient, they may prove costly in the long run, especially for regular athletes. For those who work out three times a week, the recurring cost of disposable patches, ranging from $5 to $12 each, quickly adds up. This continuous spending, month after month, year after year, can detract from the focus on what truly matters – achieving your peak performance.

Why we do not use disposable patches?

Exercising three times per week adds up a total of 144 workouts per year.
At a $5 per sweat patch the costs add up.
$ 720
00
Yearly using patches
  • Sticky on the skin
  • Harder to set up
  • Hairy bodies having problems
  • Failed patch, lost $5
  • Innacurate data

Now, there is a smarter choice.

Why choose hDrop?

Continuous

hDrop provides real-time sweat monitoring, delivering instant data on sweat loss, rate, and electrolyte levels.

Reusable

Our hydration wearable features proprietary reusable electrode sensing technology, enabling accurate and rapid tracking of sweat metrics.

Personalized

Our hydration biosensor offers personalized hydration strategies by assessing individual fluid and electrolyte losses during activities.

LEDs for pre-, during, and post-activity indications
Try hDrop

30 Days Returns Accepted*

*Used returns: shipping plus $26.99 recycling fee deducted; remainder refunded.

1 Year Warranty

Cyclist wearing the hDrop sweat testing wearable on chest during endurance ride
This is what people said about hDrop

Helpful data to have. I’ve been using the hDrop sweat monitor to better understand my sweat and sodium losses and hopefully prevent some of the cramps I experience at the end of long events when it’s hot and humid in Florida. I especially like the Sweat Zone feature to see how my well my hydration strategies are working over the course of a training run. On top of that, the company provides excellent customer service and has been responsive and helpful whenever I’ve had questions.

Eric Z. (Verified Buyer)

Triathlete

Love this gadget. I was hesitant of getting this device, but it has been such a game changer for me and my training. I changed the way I hydrate and feeling way better on my rides. Customer support was also awesome.

Neeam (Verified Buyer)

Cyclist

It is been awesome being able to track hydration on my players. Some of them struggle with heat, and being able to benchmark them helped us buy the appropriate supplements.

Pablo T. (Verified Buyer)

Tennis Coach

It’s nice to have data to look at after a workout to see where I can modify my sodium quantities.

Elvis C. (Verified Buyer)

Triathlete

Official USA Cycling Benefit Membership Provider

Learn more here.