The Ultralight Stuff Pack from Osprey is an ultralight backpack that can be stowed away in its own carrying bag in seconds. The backpack is made from a tear-resistant ripstop fabric and offers a volume of 18 liters. This makes it an excellent additional backpack for travel, where one or two souvenirs will be traveling home with you. The backpack has a zip for easy access to the main compartment and there is a security compartment inside for important items such as your wallet. With the two side bags - for drinking bottles, for example - you can get through the day easily, even on hot days. Despite weighing just 149 grams, the compact backpack-shaped material bag is comfortable to wear on your back thanks to the well-ventilated shoulder straps made from Deluxe AirMesh fabric. If you stow the Ultralight Stuff Pack in its packsack, the packing size is not much bigger than an apple - ideal as an extra bag when traveling or on fast mountain tours.