A heat transfer fluid pathway is provided driven by a pump which feeds the heat transfer fluid through a vest and cap or other heat transfer garment, where the heat transfer fluid draws heat away from the body of the wearer. A drinkable heat sink material is located within a removable cartridge located within a heat exchange pouch. The heat transfer fluid passes from the heat transfer garment to the heat exchange pouch where heat drawn from the wearer is transferred to the heat sink material within the cartridge. A temperature control valve is provided along with a bypass line so that an adjustable amount of the heat transfer fluid is routed to the heat exchange pouch for temperature control. A supply of elevated pressure air is optionally provided to maintain optimal contact for efficient heat transfer within the heat exchange garment and the heat exchange pouch.