50 Pcs Disposable Face Mask ASTM Level 3 Earloop SecureFit 98% BFE PFE Micron
50 Pcs Disposable Face Mask, ASTM Level 3, Earloop, SecureFit Design. Ultra Sensitive SecureFit ASTM Level 3 disposable earloop face masks are engineered to provide a secure, customized fit combined with high filtration performance.