Mammut Carbon Cartrige 300 bar Non-Refillable is an oxygen cylinder to combine with your avalanche airbag system. Essential element for the safety of off-piste lovers. The cartridge is wrapped in a carbon fiber, thus weighing up to 50% of a steel or aluminum cartridge. In fact, once it is filled with nitrogen, it weighs only 310 g! Compatible with Removable Airbag System (R.A.S.) and Protection Airbag System. Mammut Carbon Cartridge 300 bar cartridge for avalanche backpack