Big Capacity! Light Weight! 65 liter rucksack and only 3 lbs. 6 oz.? How is it possible? The Alpinizmo Trango 65 is built of high grade, lightweight materials, that"s how. We also took some of the bells and whistles, except for the emergency whistle, that are found on other backpacks. The Trango 65 is hydration ready, has a drawstring divider to separate the two main compartments and is very comfortable. Since light weight and durability are your goals, the Trango 65 is your backpack.