Helite Mechanical Backpack 18 L to 23 LBackpack It is made up of many pockets and compartments, a rain cover and a helmet holder. It is removable and can be dissociated from the airbag via a zipper. Its volume is expandable from 18L to 23L. Caution, the maximum load weight is 8 KG. Airbag It integrates the cartridge, the mechanical trigger system and the SAS TEC level 1 back protector. It has a space to put a water bag. It is removable and can be dissociated from the backpack via a zipper.