Built for the minimalist angler and the quick afternoon trip to the water, the Arroyo Chest Pack is big enough to fit a nymph and dry box, but small enough to be utilized as it's meant, up front and personal. Nevertheless, if you have a hankering to move fast, engage the hip straps to transform it for lumbar use. Despite its compactness, there is plenty of space for flies and tools, and has a zippered front flap with replaceable foam for bench work. Stay nimble.