Working under grueling hot conditions - whether its related to weather, protective clothing or confined spaces - exposes people to the dangers of heat stress. Ergodyne® Chill-Its® Phase Change Cooling Vests keep workers cooler, safer and more productive. • Government-tested vest reduces risks of heat-related injuries when wearing protective clothing, encapsulating suits or when working in extremely warm environments. • Maintains optimum 55 degree F/13 degree C temperature for cooling the body. • Durable cotton fabric carrier is treated with top-quality Banox FR3 for flame-resistant properties. Meets the federal testing code 191, utilizing test method 5903 for flammability • Hook-and-loop closures quickly adjust at the shoulders, and around the body for a comfortable, exact fit • Cooling lifecycle lasts up to two hours • Anatomical over-the-shoulder design conforms to the body for improved comfort • Weighs less than comparable products - no batteries, blowers or heavy ice • Comes in sizes S/M, L/XL