High Barrier mask ideal for oral exams of high-risk patients and procedures involving high levels of spray, spatter, moisture and airborne particles. Perfect for ultrasonic scalers, high-speed aerosols, air polishers and oral surgeries.BFE and PFE filtration efficiency > 98% @ 0.1micron assures a high level of protection against potential sources of infection. High Barrier (ASTM Level 3) Shingle pleat design (will not lint, tear or shred), prevents the pooling of fluids and cross contamination, while dye free nonwoven inner layer provides additional protection. Soft and strong, ample-length earloops so there is less pulling, and adjustable nosepiece for comfortable fit. Especially useful for laser procedures that generate harmful airborne particles.