Outstanding performance of the AirWave™ is due to its patent-pending, wave design technology, allowing more airflow in and out of the respirator for cool comfort and easier breathing. Unique waves double the filter surface area of comparable respirators. Dura-Mesh® shell provides bi-directional protection from dirt on the outside and moisture on the inside. FlexFit™ design expands and contracts as you move and speak, for optimal comfort. Pinch-free molded nose bridge eliminates metal nose-band readjustment and discomfort. Less cost than valved respirators plus longer wear! 10 respirators per box.