Workers can now easily fend off the effects of extreme temperatures by using the Dual Action Personal Air Conditioner (PAC). The unit is coupled with a lightweight vest which delivers either cool or warm air to the wearer's torso and neck. By wearing the vest and PAC, industrial employees working in extreme temperatures can avoid the negative impact of low temperatures in winter, as well as heat stress and fatigue in summer. The increased comfort means no loss of worker productivity regardless of extreme temperatures. Workers can adjust the system to provide either heating or cooling. Vortex tube technology provides air temperatures ranging from 30°F to 120°F. The diffuse air vests are available in three sizes to accommodate a range of body types. The durable, flame retardant vest permits full range of motion with no airflow restrictions. The material does not absorb sweat or other contaminants. It can be worn under protective clothing and features a collar that can be unfolded to deliver airflow to the neck and face.