If your looking into buying a respirator there are a few important things to remember. First what am I going to be doing that will require the use of a respirtor? One must remember that a respirators performance is not garanteed merely because of its brand or capabilities written by the manufacturer. You must be sure to use the correct filter cartriges, whether you are needing to filter organics or just particulates is very important. All filters come color coded and are labled accordingly. NOTE: NO CARTRIGE IS RATED TO PROTECT FROM H2S ( HYDROGEN SULFIDE) H2S IS A COLORLESS GAS THAT ATFIRST SMELLS OF ROTTEN EGGS THEN QUICKLY DULLS THE SENSES."The chosen IDLH ( immediately dangerous to life or health concentration value ) is based on the statements by Patty [1963] that 170 to 300 ppm is the maximum concentration that can be endured for 1 hour without serious consequences; 400 to 700 ppm is dangerous after exposure of 0.5 to 1 hour [Henderson and Haggard 1943]. AIHA [1963] reported that 400 to 700 ppm caused loss of consciousness and possible DEATH in 0.5 to 1 hour [MCA 1950]. "BE SURE YOU HAVE BEEN PROPERLY TRAINED IF YOU ARE GOING TO BE USING ANY TYPE OF RESPIRATOR.

Size and whether or not one is clean shaven (no stubble) will greatly affect the performance of the resperator. NOT ALL RESPIRATORS WILL FIT, ONE SHOULD BE FIT TESTED BY  QUALIFIED PERSONEL.