Compressed CO2 canisters, suitable for use in Helite Motion Air air jackets. The Motion Air jacket comes with one Helite canister, but for replacements, it is recommended to use a branded canister for efficacy and compatibility. Available in 2 sizes to provide effective protection according to the airbag volume. The Motion Air YR1 uses the 50cc canister. This is the right replacement if your airbag cartridge is damaged or empty. Capacity: 50cc. Compatible with all Helite Airbag vests and jackets, including sizes child-S (10 years) and child-M (12 years).