OccuNomix introduces Cool Zone Tech Cooling Vests. Technology originally designed for Black Hawk helicopter pilots. Cool Zone’s amazing “controlled temperature” technology keeps you cool and outperforms the competition in fit, form and function. Cool zone is changing the way cooling vest are made. Vests control temperature keeping you cool for up to 4 hours. UniPak Cooling pad recharge in minutes! Nobody wants to be in 130°F temperatures but when duty calls, these vests will make it seem like a day at the beach.