Best Fit Test goes onsite to any jobsite around the World Fit Testing every type of respirator including; Full-Face, Half-Face, military gas masks, fire service, law enforcement respirators to N95 filtering facepiece (disposable) respirators donned by healthcare workers. Although there are a wide variety of respirators used by industrial organization, the goal remains constant – protect individuals from known and unknown respiratory hazards. But the highest protection level can't be achieved if the respirator isn't the correct size OR is donned improperly. That's where Best Fit Test comes in.