Breathes easier than a valve respirator. Patented wave design technology allows more airflow in and out for cool comfort. Unique waves double the filter 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 there is movement and speaking, for optimal comfort. Features pinch-free molded nosebridge and Softspun® lining. Meets heat and flame resistance in accordance with ANSI/ISEA 110-2003, Section 7.11.1. NIOSH Approved. Made in USA.