MSA Advantage 420 Half-Mask Respirator Size:Large A higher number means more

A higher number means more firefighting capacity for that class

Model Filter Valve Pack Best For 2840R95 (this page) R95 No This product 2740R95 R95 No 10/Box No valve

ammonia (N75004L)

It is rated NRR 25 dB under ANSI S3

MSA Advantage 420 Half-Mask Respirator Size:Large A higher number means moreShort answer: the msa advantage 420 half mask respirator is covered below on the specifications its own listing publishes, the standards it is certified to, and who it suits. Complete guide: MSA Safety Respirators: Complete Buyer's Guide (2026) EDITORIAL PICK 4. 8 5 The MSA Advantage 420 delivers genuine silicone sealing quality at a mid range price point. AnthroCurve geometry and a seam free UniBond facepiece separate it from economy half masks