Inflatable life jackets can be reused after each inflation but the CO2 cylinder needs to be replaced before using again. Use an Onyx rearming kit to keep yours ready. It is recommended to purchase an extra rearming kit to try out your inflatable life jacket and become familiar with its operation. Before heading out on the water, always read your Owner&';s Manual for the proper way to initially arm your life jacket with the CO2 cartridge, and how to re-arm it after it has been inflated. Instructional videos available at onyxoutdoor.com. KIT INCLUDES: a 24 gram CO2 cylinder with 1/2" thread a Yellow water soluble bobbin