$39.95 $139.00
  • Waterproof down to 210 feet underwater (IPX8 compliant)
  • Includes Small Wristband & Large Wristband
  • Track steps taken, calories burned & hours slept
  • Syncs wirelessly via Bluetooth Low Energy
  • Rechargeable battery life of 5 days
  • 6 month warranty fulfilled by Waterfi see details


Introducing the Waterfi Swim Tracker
How our certification process works

PlatinumX Waterproofing icon


PlatinumX Waterproofing Technology is our patent pending, durable, comprehensive process that completely waterproofs and corrosionproofs electronics down to 210 feet underwater. Our Process


Completely waterproof down to 210 feet underwater, the Waterproofed Fitbit Flex has been waterproofed on the inside through our durable and long lasting waterproofing process so you can fully submerge your Fitbit Flex and go wherever your active life takes you. Learn more about Our Process.


No longer limited to splashes and showers, the Waterproofed Fitbit Flex can now track your activity output during your next swim, surf session and sweat drenched run. Secured with an included Fitbit Fastener Ring no activity will seperate you from your tracker.


The Waterproofed Fitbit Flex is so comfortable you won't even notice it's there - day and night. See your most active moments, calories burned, steps taken, distance traveled and sleep quality with real time feedback. A simple tap lights up the band to show your progress and keep you pumped throughout the day.


Personalize your goals and see detailed stats about your daily habits and progress on the Fitbit Dashboard. Log meals and workouts, route runs and connect with Fitbit wearing friends. Easily syncs with Fitbit App for mobile or Fitbit Connect for Macs and PCs. View Supported Devices


Track and analyze your movement throughout the day to gain insight into steps taken, distance traveled, active minutes and calories burned.

See calories in vs. calories out through Calorie Coaching and set step, weight, and activity goals to achieve personal health victories.

Measure your hours asleep, quality of rest, and resting heart rate. Set a silent alarm to gently wake you renewed and ready for the day ahead.


Your Refurbished Waterproofed Fitbit Flex is warranted by Waterfi against defects in materials and workmanship, under normal use, to the original recipient for one year beginning from the original date of purchase. see details

Note: The item for sale is a Fitbit Inc. product that has been modified after purchase by Waterfi LLC. The item is not covered by any warranties offered by Fitbit Inc. Waterfi LLC has no relationship to, or affiliation with, Fitbit Inc.


What's included with your Refurbished Waterproofed Fitbit Flex

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