Nathan Insulated Soft Flask

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This version of the 18oz. Soft Flask is insulated along with the trusty Bite Top – perfectly compatible with ALL Nathan hydration vests. This bite valve helps liquids from escaping so you can keep yourself hydrated without the mess. If you have a Nathan product, this is your back up flask! Details: Size: 18oz. Insulated properties keep fluids cooler 38% longer Bite valve keeps liquids from escaping Works great with ALL NATHAN hydration vests Easy to clean Capacity: 18 oz/535 mL Show more