dscnt r.a.s. 32l backpack compatible with the mammut removable airbag 3.0 system. removable airbag system not included - sold separatelythe dscnt r.a.s. 32l backpack is the ultimate touring backpack for technical demanding backcountry terrain. it has all the features of the dscnt 32l backpack plus the pockets that hold the mammut removable airbag 3.0 system. the removable airbag 3.0 system allows you to use the backpack with or without an airbag installed. additionally, the system uses compressed air instead of nitrogen, so you can deploy the pack before a flight and easily refill the cartridge at your destination (north american cartridges only).