... Type 40>40min,Type 60>60min poison gas and smoke protecting,fireproof,hot-radiation protecting,sealing ... kind of respirat is an essential personal poison-gas protecting respiratory apparatus,If a life emergency happens ... life: Type 40>40min,Type 60>60min poison gas and smoke protecting,fireproof,hot-radiation protecting,good ... resistance <800Pa,Exhalation resistance<300Pa. Fire Escape Mask/fire mask