3M™ Health Care Particulate Respirator and Surgical Mask 1860, N95 120 EA/Case | 3M United States
3M 1860 N95 Respirator & Surgical Face Mask | Genuine PPE
Methylene blue applied to N95 respirators and medical masks for SARS-CoV-2 decontamination: What is the likelihood of inhaling methylene blue? - ScienceDirect