FOUNDERS7 September 2026 · 40:28

Why It Took 6 Years to Build This Sweat Sensor

Stefan van der Fluit

Stefan van der Fluit

Founder & CEO, FLOWBIO

FlowbioWearablesHealth-hardwareFoundersRetailHydrationFLOWBIO

Show Notes

In This Episode

  • How Stefan's experience of dehydration led him to build FLOWBIO
  • How the sensor measures sodium and fluid loss during exercise
  • Why difficult hardware development can become a competitive advantage
  • The shift from direct-to-consumer sales to retail partners
  • Building authentic relationships with athletes and a focused product strategy
  • The difference between creating value and capturing it

Timestamps

  • 0:00 Cold open
  • 0:49 Meet Stefan van der Fluit
  • 1:32 How dehydration became the problem
  • 5:20 How the FLOWBIO sensor works
  • 8:04 Who the product is built for
  • 9:45 Why hardware is so hard, and defensible
  • 15:19 The shift from DTC to retail
  • 18:03 Educating the people on the shop floor
  • 21:20 Why most brand communities feel fake
  • 23:40 Building authentic relationships with elite athletes
  • 25:35 “Spot the Bulge” at the Tour de France
  • 26:48 Your only competition is yourself
  • 28:35 More conversations create more luck
  • 32:08 Useful products and good stories
  • 33:27 Humility and leadership
  • 34:56 Collaborating with Garmin-scale giants
  • 36:31 Go an inch wide and a mile deep
  • 38:00 Creating value versus capturing it
  • 39:29 What comes next for FLOWBIO
  • 40:17 Wrap-up

Links

Disclosure

Will Read is an investor in FLOWBIO.

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Interviewed by

Will Read
Will Read
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