Gerson 1940 review — Gerson 1940 R95 Flame-Resistant Particulate Respirator with Valve (Box of 10)
Verdict: 4.2/5. The Gerson 1940 is a made-in-USA flame-resistant R95 with a valve — spark-resistant oil-tolerant filtration for hot-work dust. Step up to P100 or cartridges for heavy fume.