• BREATHING APPARATUSESThis protection equipment intakes air from absolutely not polluted areas and send it to areas where the worker has to operate for an extended lapse of time and where oxygen is lacking. These breathing apparatuses consist of fans or compressed air systems.• SELF-CONTAINED BREATHING APPARATUSThese instruments allow workers to operate in environments with polluted and low oxygen content air, for not very long time (and according to thoxygen reserve contained in a portable bottle or cartridge attached to the self-contained breathing apparatus).As a general rule, self-contained breathing apparatus are easier to wear and effective in emergency conditions.