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Osprey Hydraulics Soft Flasks

SKU# OSP_10428/9

The Hydraulics™ Soft Flasks compress as you drink which means less bulk to carry around and less sloshing as you run. Designed as an add-on or aid replacement for Duro and Dyna vest-pack harness pockets.

Availability: In stock

  • 250ml
  • 500ml

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All Mighty Guarantee


  • Soft flasks are lightweight and collapsible
  • Includes both standard sport cap and bite valve with extension hose options


Capacity 250ml, 500ml
Dimensions 22 x 7.1 x 0cm (250ml)
19.7 x 10.8 x 0cm (500ml)
Average Weight 30g (250ml), 40g (50g)
Made From TPU film (BPA and PVC free)

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Date Score Customer Comment Our Response
19-Mar-2018 Product:

Used this product for Spirited Woman Adventure race. Had two flasks in the front of my osprey 15l vest. I used pure endurance race formula in these which enabled me to have plain water in the 2.5l hydration pack.
13-Feb-2018 Product:

I really should have bought the 500ml flask but the extension hose is handy!
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