The HydraPak SoftFlask WMXS is a 500 ml hydration flask built specifically to fit the wide, short pockets of running vest-style packs. Constructed from lightweight 0.25 mm clear TPU film with pinch-weld construction and a tapered pinch-weld bottom, it stays flexible and conforms naturally to pack pockets. A 42 mm wide-mouth opening makes filling straightforward, while the silicone-sheathed high-flow bite valve auto-seals after each sip to prevent leaks. As the flask empties, its compressible design collapses to minimize sloshing and packs down flat when not in use.
500 ml capacity
0.25 mm clear TPU film construction with pinch-weld build
42 mm wide-mouth nozzle for easy filling
High-flow silicone bite valve auto-seals after each sip
Tapered pinch-weld bottom fits wide, short vest pack pockets
Compressible design reduces slosh as liquid depletes
