The North Face Flyweight Rucksack ($50) is perfect for lightweight multiday trips. This fully featured pack is constructed with lightweight, water-resistant, nylon ripstop fabric for a total base pack weight of 13 ounces. The Flyweight Rucksack features a 25-liter capacity, dual Airmesh shoulder straps, multiple pockets and side compression straps. And thanks to its compressible design, you can easily stuff the pack in its own interior pocket when not in use.