Precision Fuel & Hydration lightweight, portable soft flask is ideal for trail running and swimrun.

- Weighs only 29 grams!
- Fast-flow bite valve that's easy on your teeth
- Shrinks while you drink to eliminate 'sloshing'
- Fill marks so you can easily mix up drinks to your needs
- BPA/PVC free, will not taint taste
- Can be compressed down for easy storage