Hydrate effortlessly with this 500mL flask, designed for compatibility with vestpacks. A WingStay™ removable stabilizer prevents bounce, while a wide-mouth opening makes it easy to load ice or mix in electrolytes. A high-flow valve, easy-grip twist cap and tapered shape simplify hydration. Crafted with durable TPU and RF-welded seams, and compatible with the UltraFlask Filter Cap (sold separately).
WingStay removable stabilizer prevents bounce
Large 42mm opening for quick ice and drink mix loading
Tapered shape for easy pocket loading
High-flow, self-sealing bite valve
Durable TPU- and RF-welded seams
Easy-to-grip twist cap
Bounce-Free Performance
A WingStay removable stabilizer is included with all Hydraulics 500 mL soft flasks to maintain its shape and prevent the flask from bouncing as you run, even when it's empty.
