When ordering Co2, please refer to your vest model. Any questions on sizing, please call or email. C02s cannot be exchanged or returned due to shipping.
50cc: MC3, VestJV, HS-5, MX-7, SKV, H: Small and medium
60cc: MLV-C, MLV-RC, MLV-P, Motorrad-2, EU-6, RS-1, H: Large and XL