First Line Technology

First Line Technology works with first responders and the military to develop innovative products that make their jobs easier and their lives, and the lives of the people they serve, safer. Heat-activated PhaseCore Cooling Vests absorb body heat and provide a long-lasting cooling effect that will not overcool the body. The gentle and systematic cooling effect helps to increase productivity while reducing heat-related illness, stress, and injuries. Designed to be comfortable and lightweight, PhaseCore Cooling Vests prepare you to handle any task.