1 Box/Boxes (50 Each / box)  The fluid-resistant, polypropylene outerfacing provides great protection while the soft cellulose provides comfort on the inside. The ear loops are sonically sealed to the outside of the mask virtually eliminating the possibility of facial irritation and ensures a secure closure. The full-width, covered nosepiece guarantees proper closure and reduces the chance of wire exposure. This Isolation Mask Helps Protect From the Inside and Out!