Naked® Running Flask - 500mL.

5 reviews Write a Review
FLASK 500ml
Due to a delay with our flask shipment, flask orders will not ship until approximately 6/10/21.
5 customers are viewing this product

With our new 500ml soft flask – Made by Hydrapak – you get even more world class performance out of your hydration system. Designed to maximize the ergonomics in our running vests, the low profile flask with 28mm cap and high flow bite valve shrinks as you consume your liquids reducing it’s mass and volume. Weighing a scant 28g. it is the perfect companion for all ultralight Naked products.

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



  • 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
  • Bottle Bright always helps keep your flask smelling and tasting fresh

*Vest Shown in Picture Not Included

? Have Questions? Ask an Expert

Naked® Running Flask - 500mL.


Customer Reviews

5 Reviews
  • no-slosh tube works well

    Posted by Katy on Sep 26th 2021

    Works great as a back-up to the flask I attach to a drink tube on long runs. Fits well in the back of my running band. Pops out of the running band on occasion if not properly pushed into the largest pocket. Solid addition to long runs!

  • Very happy

    Posted by Sam O on Aug 26th 2020

    Fit nicely in Naked belt. Didn't leak. Easy to drink from while running - the bite valve and soft structure made it easy to drink with no worries about sloshing or air getting in my mouth. Was easy to get every drop of water out while running.

  • Better than standard flasks

    Posted by Chris Pauls on Jul 15th 2020

    I own a Naked Innovations Vest, which I LOVE! It came with two flasks, and they are much more comfortable than standard flasks with a wider opening, so I decided to order two more for longer unsupported runs. These work great and don't irritate me after being pushed against my body for several hours. The vest and belt are awesome, too!!

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