The first thing to do is that you must choose the proper gas masks for the application. A gas mask is only half of the security system. You can get detailed information about the gas masks like israeli gas masks via http://www.rddusa.com/shop/israeli-civilian-gas-mask-adult-with-filter-model-4.
There is also a cartridge that can work under nearly all potential hazards. You should always look for ranking the cartridge before you will choose to use it. Make sure that it will work for the application.
For the second thing you should do is that you need to get the right size of a gas mask. The right mask is really important. If the mask will not fit your face, it will not work properly. This allows the gas to get past the side of the mask and also harm you.
How simple fitting gas masks is that you have to push the mask on your face and your chin where he will feel tight and also cover the area of the air inlet. If you can not breathe, it means that there is a tight fit and also will work properly. Make sure that it will fit properly.
The last thing that will be important for you is that you have to install the cartridge and also put a mask on your face. You need to keep in mind your own mask will not be good, you must install the cartridges that can filter out harmful gases to the air. By placing the mask on your face will also take some trial.