The Big Sur Water Pack features 3 external zippered storage pockets with internal organizers. Easy Flo bite valve is soft and easy to operate Widemouth top allows reservoir to be turned inside out for drying and cleaning New Reversible Reservoir II has an easyon, easyoff plastic slider that forms a complete seal over the folded reservoir top Air Chairman ventilation system creates cooling airflow between your back and the pack New Hypalon reinforced section
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