Clear Lake
Rated 5.0 out of 5 stars
3 Reviews

Trail Runner™ Soft Flask

Water & Hydration


Selected: Clear Lake

We teamed up with Hydrapak® to bring the performance of their iconic soft hydration flasks to you and your dog’s next adventure. They’re made of a pliable, lightweight material for a hydration solution that’s easy carrying – whether that’s in your running belt or your running vest (or your dog’s). Just twist the valve and squeeze the bottle to dispense water for a trailside straight-from-the-spout-sip or a dog bowl refill.

Compatibility: Trail Runner™ Belt (360 ml); Trail Runner™ Running Vest (360 ml for size XS; 500 ml for size S - L/XL) 

Final sale. Not available for return.



Iconic Hydrapak® design with soft material that conforms to most hydration vests, belts, and pockets.


Flexible design shrinks as you drink for less sloshing and more space savings.


Twist valve and squeeze to dispense water.

Materials & Care

  • Materials

    • TPU, PP/POM, Silicone
    • Made in China
  • Care

    • Hand wash
    • Mild detergent
    • Air dry

Select Size

Find the right size for you. If using with the Trail Runner™ Belt, we recommend the 360 ml. For replacing flasks for the Trail Runner™ Running Vest, we recommend 360 ml for size XS and 500 ml for size S - L/XL.

Select Size

Trail Tested Promise

All of our products are rigorously field tested and we proudly guarantee against defects in materials and craftsmanship.

Ratings & Reviews

Rated 5.0 out of 5 stars
Based on 3 reviews
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
3 reviews
  • Suzanne M.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    Soft flask

    Is it a fill and drink from I like that it’s collapsible

  • Samantha H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Small but useful

    Easy to fill, doesn’t leak

  • Robin A.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    5 months ago
    Very easy to use!

    Very glad I got this to tuck into a trail hip pack. Makes for very easy water carrying especially now that it's getting warmer

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