A spare carrier for your BulletSafe bulletproof vest is a great option to have if you wear your vest everyday. This system allows you to wear one carrier while the other is being cleaned or as an alternative should your original become dirty or worn out. Your bulletproof vest size is not your t-shirt size. If you have a larger midsection, choose the size at the top of your size range. If you have a smaller midsection, order at the bottom of your size range. BulletSafe Spare Carrier for Bulletproof Vest BS54002