Make your staff more comfortable and productive with Healthmark's Single-Use Cooling Vest. Lightweight and durable, the vest helps staffers maintain a comfortable temperature for extended periods of time when used with Healthmark's reusable Phase Change Packs. The Single-Use Cooling Vest is available in packs of five. Check out the rest of Healthmark's line of Cool Aids that include beanies, skullcaps and neckbands. Just soak them in cold water for a few minutes and get hours of cooler temperatures.