Dynafit Soft Flask
Best lightweight hydration solution for long distance trail runners.
This is the ultimate solution for runners who hate the distraction of sloshing water. Its collapsible design shrinks as you drink, keeping your pack profile slim and stable. You sacrifice the rigid structure of a traditional bottle, but you gain a nearly weightless, clutter-free experience that disappears once empty.
$29.95
Who it's for
- Trail runners seeking a quiet and compact hydration solution
- Endurance athletes needing efficient water intake during high-intensity efforts
- Mountain runners who prioritize fast refills and easy maintenance
Who should skip it
- Racers using vests with narrow or unstructured storage compartments
- Users sensitive to the flavor profile of synthetic materials
- Backcountry explorers frequently navigating rugged or thorny terrain
Performance breakdown
Packability
Collapses down to almost nothing once the liquid is gone.
Slosh Control
Shrinking design keeps liquid stable and silent during high-intensity movement.
Material Safety
BPA and PVC-free construction ensures clean, chemical-free hydration.
Refill Speed
Wide-mouth access is standard, but requires focus during quick aid stops.
Durability
Robust enough for daily training, though thin walls demand careful handling.
Weight Efficiency
At 26 grams, it is virtually imperceptible in your race vest.
Key Specs
Capacity
0.5 Liters
Weight
0.92 ounces
Material
BPA-Free Plastic
Collapsible
Yes
BPA Free
Yes
Product Type
Soft Flask
Insulated
No
Dishwasher Safe
No
Leak Proof
No
Reservoir Included
No
Know before you buy
Still have a question?
Ask Metto anything about the Dynafit Soft Flask before you decide.
