Ergodyne’s lightweight phase-change cooling vest uses cooling packs that can be chilled in a freezer or cooler to keep the vest at 59° F for up to two hours at a time. The vest can be worn under PPE and other protective gear, and the grid pattern on the cooling packs allows for greater freedom of movement. The vest weighs only 4 lb when using the cooling packs. Ergodyne; www.ergodyne.com