The Serfas© Ark Expandable Half-Frame Bag can adapt to accommodate more gear with an expandable bottom and resists the elements with a durable water resistant construction. Thirsty? Pack your favorite hydration bladder and utilize the integrated Hydration Port routing.
Design Updated (2020) 5 additional frame attachment points have been added to the bag bottom for an even more optimal secure fit on various frame shapes and sizes.
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