Basic Isolation Mask. Our Basic Isolation Mask with Earloops (NON27110)has a tissue inner and outer facing making the mask light and comfortable. The Isolation Mask with Earloops (NON27122) features aloft, fluid resistant polypropylene inner and outer facing assuring comfort on the inside and protection on the outside. The full-width nosepiece guarantees proper fit. BFE > 99% PFE >N/A.