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).
Features
WingStay removable stabilizer prevents bounce
Large 42mm opening for quick ice and drink mix loading
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.