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Naked® Running Flask - 350ml

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With the new 350ml soft flask – Made by Hydrapak – you get even more world class performance from your Naked hydration system. Designed to maximise the ergonomics in their running vests, the low profile flask with 28mm cap and high flow bite valve shrinks as you consume your liquids reducing its mass and volume. Weighing a scant 28g. it is the perfect companion for all ultralight Naked products.

Run with confidence knowing that these flasks come with Hydrapak’s famous Beyond Lifetime Guarantee.

Compatible with the Naked Drink Tube Kit available here. 


  • 100% BPA and PVC free
  • Weighs 28g
  • Low profile
  • Shrinks as liquids are consumed


  • A little TLC and your Naked® soft flask by Hydrapak, will serve you for a long time. Remember to:
  • Hand wash or place on the dishwasher top rack
  • Use +60C / 140F water temperature
  • Keep cap placed on when not in use
  • Keep out of direct sun for extended periods of time