Helite Tethered C02 Cartridge Refill This Co2 Canister is great to have on hand to refill your Helite jacket after it has been inflated. Every Helite jacket and vest comes prefilled with one of these Co2 Canisters. Make sure you purchase the same size canister that came with your Helite garment. Features: Includes 1 screw in C02 canister Compatible with Helite tethered airbag systems only 60cc Compatibility: Helite Custom Leather Vest - All sizes Helite Free Air Vented Jacket - All sizes Helite GP Air Vest - Sizes SM to Xl-L Helite H-Moov Tethered Airbag Backpack Helite Leather Airbag Jacket - SM to 4XL Helite Turtle Vest - Sizes SM to XL 100cc Compatibility: Helite Leather Airbag Jacket - 5XL & 6XL Helite Turtle Vest - Lg-L & Xl-L