Ultra Flask Speed 500Ml 2-Pack - Collapsible Soft Flask Water

Part of our ultra-light series, the 500 ml is so light, you might forget you brought it. Weighing in at just over an ounce, it’s optimal hydration, no matter what kind of runner you are. Topped with our SpeedFill cap for quick aid station refills and is ready for use with or without the tube.

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