3M 6503 Rugged Comfort Half Facepiece Reusable Respirator, NIOSH, Large M31 size and adjust the straps

size and adjust the straps so the back D-ring sits centered between the shoulder blades

metal fume and welding smoke

they slip on and off quickly for material handling and warehouse tasks

color-accurate view of the weld pool than standard ADF lenses provide

3M 6503 Rugged Comfort Half Facepiece Reusable Respirator, NIOSH, Large M31 size and adjust the strapsAMAZON CUSTOMER RATING: 4. 7 5 WC Safety research note on the 3M Half Mask Respirator, a half mask respirator. Rating shown is the Amazon customer rating at the time of writing, not our own score. Specification based assessment by Steven Eaton, WC Safety Editorial, from the published 3M listing and NIOSH 42 CFR 84 and OSHA 1910. 134. We have not hands on or laboratory tested this product. The 3M 3M 6503 Rugged Comfort Half Facepiece Reusable