The Mammut Ultralight Removable Airbag pack was created with one purpose in mind—to be the lightest airbag backpack on the market. With this goal in mind, the designers at Mammut slimmed down just about everything that can be slimmed down on a backpack, leaving a skimpy-looking bag of orange fabric and thin gray straps weighing only 1.7 kilograms, but still packing an inflatable airbag that one day, maybe, will save your life.