UltrAspire Softflask
Best collapsible hydration flask for long-distance trail runners.
This high-capacity flask is the ultimate solution for long-distance runners who hate bulky gear. Its wide mouth makes mid-run refills and ice loading effortless, though the larger volume can feel slightly cumbersome in smaller vest pockets until you've sipped your way through the first few miles.
$24.95
Who it's for
- Ultrarunners needing significant hydration without extra bulk
- Athletes prioritizing quick, hands-free hydration on the move
- Trail runners seeking a comfortable, stable vest fit
Who should skip it
- Users wanting effortless cleaning and rapid drying
- Runners needing quick, easy refills at aid stations
- Hikers carrying gear with sharp or abrasive edges
Performance breakdown
Packability
Collapses down to almost nothing when empty for effortless vest storage.
Refill Efficiency
Wide 42mm opening makes mid-race refills and ice loading remarkably fast.
Flow Rate
Silicone bite valve delivers consistent hydration without requiring excessive suction effort.
Leak Prevention
Locking cap mechanism provides reliable security against accidental spills during movement.
Material Durability
PVC construction handles rugged trail use well but shows wear over time.
Ergonomic Handling
Shape conforms comfortably to the body, minimizing bounce while running.
Key Specs
Capacity
800mL (27.05 oz)
Material
PVC & BPA free
Cap Diameter
42mm (Locking)
Height
304.8 mm
Width
114.3 mm
Intended User
Runners
Closure Type
Screw Top
Know before you buy
Still have a question?
Ask Metto anything about the UltrAspire Softflask before you decide.
