When available, respirators (instead of facemasks) are preferred. Protective respirators and masks should have particle filters, particularly for aquatinting. The SNS could provide only 93,600 N95 respirators and 100,200 surgical masks. Capsaicin is a strong irritant requiring proper protective goggles, respirators, and proper hazardous material-handling procedures. They also wear industrial respirators for protection from caustic vapors. This led to him developing efficient respirators and ventilators. First aid kits, firefighting equipment and respirators are commonly carried. This type includes airline respirators and self-contained breathing apparatus (SCBA). Despite the radiological dangers, they had no radiation suits, no respirators, and no working dosimeters. ILC produces powered air purifying respirators (PAPRs). Sometimes negative pressure rooms or powered air-purifying respirators (PAPRs) are also used. Subsequent respirators were reusable but bulky and uncomfortable. These may also be labeled "Surgical N95", "medical respirators," or "healthcare respirators". Full-face versions of elastomeric respirators seal better and protect the eyes. The effectiveness of various types of respirators was measured in laboratories and in the workplace.