The EAV is easy to use and was designed to make it easy especially when people are in a incident. You simply put the EAV on your body securing at the waist and shoulder. When comfortable fit the eyewear and the nose clip. Then simply remove the mouthpiece from its holder and put in your mouth and start to breathe through your mouth. Remember there is no valves to operate and if you are in clean air then you simply remove the mouthpiece and save air. The torch, whistle and glow sticks can be used to attract attention where required.