The invention is a reusable personal cooling apparatus that utilizes exclusively pourable pellet forms of Carbon-Dioxide Pellets as an expendable coolant. This coolant is placed in one or more compatibly designed, refillable Coolant Chambers that are integrated into a wearable garment that can be either a Hard-Shell Design (by example, an impact-protection helmet) or a Soft-Shell Design (by example, a vest), or a combination thereof. The Carbon-Dioxide Pellets are of machine manufacture and high density. They enhance the conformability of the Soft-Shell Design garment, promote ease of filling both garment designs and make possible the application of the pellet form of coolant to rigid, thin, curved structures like a helmet.The application of vibration expedites the speed of filling the apparatus and maximizes the fill volume by minimizing void formation within the Coolant Chamber. The cooling effect is achieved through the process of phase transition wherein solid carbon dioxide subliminates to Carbon-Dioxide Vapor which in turn is vented toward the skin of the individual wearing the garment. The ramifications are a versatile, reusable, convenient and diversely configurable personal cooling apparatus and a complementary coolant that function together to enhance personal comfort.