45 liter backpack rain cover Peak Design Travel Fly for Backpack, 45L, Waterproof for Hiking or Travel, Siliconized Ripstop Nylon, Integrated Carry Pouch, Rain Cover : Sports & Outdoors dirt and sand 45l Backpack Rain Cover, Rucksack

LED Lighting System Fluval Chi features two separate cool-white LED lighting units: a 12 LED submersible light unit illuminates the aquarium from the bottom of the filtration box, while a second set of LED's shines upward and lights the water as it flows back into the aquarium

Open cell foam padding on the back of the backpack and shoulder straps generates a kind of air pumping effect for ventilation, while also creating a secure fit

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In the 55L version that we tested, the Black Hole weighs 2.6 pounds, ultimately earning it a ratio of .77 ounces per liter