WLS14110403 / 14110403 N1139 SAFEFIT PLUS SAF-T-FIT® PLUS N1139 Respirator This respirator offers N99 protection combined with a full sealing flange for the best fit and protection available. Excellent for general industrial, welding, soldering, metal cutting, metal pouring, torch cutting, and other high temperature or dusty operations, it provides 99% efficiency against oil-free particulates. An exhalation valve eases breathing and offers exceptional comfort during extended wear. Three sizes are color-coded for quick, easy recognition. Latex-free. Meets NIOSH 42CFR84 Standard.