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- Review by Treeline Review writer Gabi Reyes-Acosta Other hiking daypacks we tested Camelbak Arete 18 Weight: 12 oz Fits waist: n/a Fits torso: 15-21 in Capacity: 16.5 L Hipbelt: No What we liked: The Aretes small size means it can serve as the reservoir sleeve of a larger pack in a pinch What we didnt like: Limited weight carrying capacity The Camelbak Arete 18 is designed to be a packable daypack one that can roll up in luggage or bring inside of a bigger backpacking backpack to bag summits or head to the lake from your basecamp

3 1/4 - 7 oz

Power: 4 AAA batteries for about 4-5 hours of continuous use How It Works The Sensor: The round sonar sensor automatically turns on when placed in the water

It glows thanks to bioluminescent bacteria, typically from the genus Photobacterium , which live inside specialized tissue at the lures tip

You also need a means of propelling yourself (i.e., a paddle) or an anchor